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  1. #201
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    ^^^ great question. In reading their stuff, it seems that Reaktiv is replaced with the same damping system Avalanche puts in other Fox DPS shocks, so whether or not your shock is Reaktiv is immaterial to the end result.
    What, me worry?

  2. #202
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    Have a set of shock hardware for Fox if anyone interested. 30.00 shipped.

  3. #203
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    Anyone running the .86 volume insert?

  4. #204
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    Thinking about picking up a 210x55 DPX2 for my EX 9.8. Would it be worth it to spend the extra to get the Factory version over the Performance? I am not sure if I would miss the LSC much as I do not mess with settings much once I get it where I like it and I do not ride at warp speed. But at the same time, the difference is only about $100.

  5. #205
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    Quote Originally Posted by jhatfie View Post
    Thinking about picking up a 210x55 DPX2 for my EX 9.8. Would it be worth it to spend the extra to get the Factory version over the Performance? I am not sure if I would miss the LSC much as I do not mess with settings much once I get it where I like it and I do not ride at warp speed. But at the same time, the difference is only about $100.
    Not sure if it would really be worth it - that rather depends on what "worth" means to you. But for the 100 bucks, I'd go for it. Oh, and I don't ride at warp speed either, but you never know how your riding will progress. I always believe in "overbuying" at least a bit.

  6. #206
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    I found one 210x55 2018 DPX2 that is "used" but has M/F tune. Any ideas how would the firm rebound tuning get along with the Fuel EX? Looks like the HSC is firm as well? I am 200+ lbs on the bike, not sure if that matters.

    This is the tune:
    2018, FLOAT DPX2, F-S, K, 3pos-Adj Evol LV, Rocky Mountain, Altitude Carbon 90 C1, 210, 55, 0.4 Spacer, CM, RF, Rezi A F F, PMS-7466C/PMS-7466C Logo
    Last edited by jhatfie; 04-18-2019 at 05:35 PM.

  7. #207
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    Decided to go with a regular factory 210x55 DPX2. Got a 2020 version coming when they ship in a couple weeks. Was tempted with a Ripmo version for $360, but figured if I was spending the $$, might as well put down a little more and get the Factory version....plus it will match my 140mm float factory fork better. = )

  8. #208
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    Just wanted to thank you guys for the intel about the DPX2. I installed one and it's made the difference between selling the bike and keeping the bike.

    A little background, I sold my Santa Cruz Bronson and bought a 2018 Fuel EX 9.8. I liked the Fuel, especially how it climbed and how it fit, but never felt it was as plush and responsive as the Bronson on downhills. I chocked that up to going from 150mm VPP suspension and 27.5 to 29, single pivot and 130mm. Everything has its tradeoffs.

    I couldn't put my finger on what I disliked about how the Trek rode downhill, but it just seemed kind of chunky and sloppy handling at speed. I also bought into the hype about the Penske Racing tuned shock and thought it was proprietary and couldn't be replaced.

    Anyway, read this thread and learned others were having similar issues, and after installing the DPX2 and playing with PSI and other adjustments, the bike immediately rode better. I wasn't ready to conclude that it wasn't a case of new-toy euphoria/placebo effect. I rode yesterday on a 14-mile ride and posted 19 Strava PRs including 9 fastest times.

    It corners better, pumps better (maintaining speed in the whoops) and just handles better. It's faster, but more importantly, more fun to ride.

    Not trying to sell anyone anything, but if they're on the fence, that's my take, and wanted to share because others providing their experience likely prevented me from selling my bike. While that shock isn't cheap by any stretch, it's cheaper than replacing the bike.

  9. #209
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    Quote Originally Posted by techfersure View Post
    Have a set of shock hardware for Fox if anyone interested. 30.00 shipped.
    still? for the DPX2 and FEX?
    2019 Santa Cruz Bronson 3.0 S+
    -2016 Trek Fuel EX 7 29Ē converted 27.5Ē

  10. #210
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    Im still looking where to purchase the hardware to install my new shock..because as of now its been staring at me for 2 days as im trying to figure out where to buy the mounting hardware..So far, i havent any luck finding where to buy the kit?
    2019 Santa Cruz Bronson 3.0 S+
    -2016 Trek Fuel EX 7 29Ē converted 27.5Ē

  11. #211
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    Quote Originally Posted by Xtatic77 View Post
    Im still looking where to purchase the hardware to install my new shock..because as of now its been staring at me for 2 days as im trying to figure out where to buy the mounting hardware..So far, i havent any luck finding where to buy the kit?
    Your local Trek dealer, mine keeps them in stock!

  12. #212
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    Pro Bike Supply is having a sale

    Here's the link to the 210x52.5 Trek Fuel Ex model.

    https://www.probikesupply.com/collec...dware-included

    I've gotten along well with the stock RE:aktiv shock. It does fine on shorter, less technical rides; however, it seems to get a bit overwhelmed on longer (3 hours+) rides, especially on some of the more technical trails here in New Mexico that have long climbs and long descents.

    Will post back with riding experience after a few rides.
    2020 Turbo Levo SL Expert Carbon

  13. #213
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    That shock at probikesupply I think will also be a 2020 model. I had one on order and that is what they told me before I found my new 2018 DPX2 on sale.DPX2 for 17/18 Fuel EX?-inked20190504_085626_li.jpg
    Last edited by jhatfie; 05-05-2019 at 09:31 AM.

  14. #214
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    Quote Originally Posted by jhatfie View Post
    That shock at probikesupply I think will also be a 2020 model. I had one on order and that is what they told me before I found my new 2018 DPX2 on sale.Click image for larger version. 

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    Got mine installed on my '16 Fuel EX 7. Not sure how you guys managed the through bolt on top or what you used..but i had to drill cut and get pissed off about 503908282 times before i got it to work after visiting hardware store... pain in my ass..all i gotta say..
    DPX2 for 17/18 Fuel EX?-img_0036.jpg
    2019 Santa Cruz Bronson 3.0 S+
    -2016 Trek Fuel EX 7 29Ē converted 27.5Ē

  15. #215
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    Quote Originally Posted by Xtatic77 View Post
    Got mine installed on my '16 Fuel EX 7. Not sure how you guys managed the through bolt on top or what you used..but i had to drill cut and get pissed off about 503908282 times before i got it to work after visiting hardware store... pain in my ass..all i gotta say..
    Click image for larger version. 

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    Hardware available at Trek dealers, mine had them in stock.

  16. #216
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    Quote Originally Posted by techfersure View Post
    Hardware available at Trek dealers, mine had them in stock.
    Mine did not. They had to call trek and figure it out. Even then the kits I got from both Fox and Trek do not have a through bolt for the top.
    2019 Santa Cruz Bronson 3.0 S+
    -2016 Trek Fuel EX 7 29Ē converted 27.5Ē

  17. #217
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    Hey guys,

    Just trying to get clarification on a few things. I'm looking to purchase this shock in the next few weeks. Not sure how long Pro Bike Supply will have them on sale....

    So the 210X52.5 made specifically for the FEX; is it a truunion mount? Will I need to order a specific mounting kit for this to fit the 9.9?

    The 210X55 version with the stroke being 2.5mm longer does that increase the travel of it closer to 140mm? I currently have a 140mm fork so it may be better.
    Also, what is the mount for this and it appears this version takes more modification to mount correct?

    Thanks!

  18. #218
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    Quote Originally Posted by Awhitt82 View Post
    Hey guys,

    Just trying to get clarification on a few things. I'm looking to purchase this shock in the next few weeks. Not sure how long Pro Bike Supply will have them on sale....

    So the 210X52.5 made specifically for the FEX; is it a truunion mount? Will I need to order a specific mounting kit for this to fit the 9.9?

    The 210X55 version with the stroke being 2.5mm longer does that increase the travel of it closer to 140mm? I currently have a 140mm fork so it may be better.
    Also, what is the mount for this and it appears this version takes more modification to mount correct?

    Thanks!
    This is the one the trek guy Mitch on this site told me to buy. It is not trunnion mount. I had to buy a bolt and nut from the hardware store.
    Attached Thumbnails Attached Thumbnails DPX2 for 17/18 Fuel EX?-187bc805-6133-4063-a8ba-488b51c0ff4e.jpg  

    2019 Santa Cruz Bronson 3.0 S+
    -2016 Trek Fuel EX 7 29Ē converted 27.5Ē

  19. #219
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    Quote Originally Posted by Xtatic77 View Post
    Got mine installed on my '16 Fuel EX 7. Not sure how you guys managed the through bolt on top or what you used..but i had to drill cut and get pissed off about 503908282 times before i got it to work after visiting hardware store... pain in my ass..all i gotta say..
    See posts 13 and 23.
    Whining is not a strategy.

  20. #220
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    Quote Originally Posted by kosmo View Post
    See posts 13 and 23.
    Mine is not a trunnion. Mine is a through bolt.
    2019 Santa Cruz Bronson 3.0 S+
    -2016 Trek Fuel EX 7 29Ē converted 27.5Ē

  21. #221
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    Quote Originally Posted by Awhitt82 View Post
    So the 210X52.5 made specifically for the FEX; is it a truunion mount? Will I need to order a specific mounting kit for this to fit the 9.9?

    The 210X55 version with the stroke being 2.5mm longer does that increase the travel of it closer to 140mm? I currently have a 140mm fork so it may be better.
    Also, what is the mount for this and it appears this version takes more modification to mount correct?
    See posts 13 and 23 for mounting tips. Trek top bolts work top and bottom on the 9.9, though you'll have to shorten the "top" bolt for use on the bottom.

    Hardware "shoulder" bolts work, too, with a bit of machining or careful grinding. However, don't over tighten them, or you could crush the bearings. The Trek system protects you from this.

    Pretty expensive Trek bolts, though!
    Whining is not a strategy.

  22. #222
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    Quote Originally Posted by Xtatic77 View Post
    Mine is not a trunnion. Mine is a through bolt.
    Even easier, then!
    Whining is not a strategy.

  23. #223
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    Quote Originally Posted by Xtatic77 View Post
    This is the one the trek guy Mitch on this site told me to buy. It is not trunnion mount. I had to buy a bolt and nut from the hardware store.
    So you're saying the 2018 version is different than the 2019 mounting wise?
    Because the size you bought isn't the correct one for the Fuel...

  24. #224
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    Quote Originally Posted by kosmo View Post
    See posts 13 and 23 for mounting tips. Trek top bolts work top and bottom on the 9.9, though you'll have to shorten the "top" bolt for use on the bottom.

    Hardware "shoulder" bolts work, too, with a bit of machining or careful grinding. However, don't over tighten them, or you could crush the bearings. The Trek system protects you from this.

    Pretty expensive Trek bolts, though!


    Good Info!

    Thanks!

  25. #225
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    I think people are looking for the actual Trek hardware part numbers needed.

    Number TCG Part Number Description Notes / Torque Quantity Needed
    15 540755 Upper Shock Bolt - Main Axle 1
    16 W293466 Rocker Bearing 10mm ID 19mm OD 5mm W 2
    17 540755 Upper Shock Bolt - Fastener 10 nm 1
    25 W320302 Lower Shock Nut RD Zip tie guide 1
    26 W511147 Lower Shock Bolt 10 nm 1

    Item Description or Specification
    Frame Travel 130mm / 5.1" Rear (Front Compatible to 140mm)
    Shock Eye to Eye and Stroke 210 x 52.5mm Metric Only
    Upper Shock End Width 60mm
    Upper Shock Hardware Trunnion to Pin Adapter, 10mm OD
    Lower Shock End Width 50mm, Offset 10mm to the Non Drive Side
    Lower Shock Hardware M8 x 1.25 x 64mm, mates to W320302

    DPX2 for 17/18 Fuel EX?-2017_fex_5_to_98_suspension_diagram.jpgDPX2 for 17/18 Fuel EX?-2017_fex_5_to_98_suspension_diagram2.jpg

  26. #226
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    Quote Originally Posted by kosmo View Post
    OK, got a little clarity on the fit issue with a trip to the. LBS.

    The stock 9.8 upper shock bolt will work perfectly, so that's on the way from Trek.

    The lower bolt from the 9.8 will not work, because it is 8 mm o.d., and the "ears" on my 9.9's swingarm have 10 mm holes, to allow for the two lower mounting bolts that the fancy through-shaft shock uses.

    So, a trip to the local hardware store for a nut and bolt, along with some minor machining, and it cost me all of $4 and 15 minutes of shop time to fab up my own lower mounting bolt.

    Getting closer!
    Hi, Iím looking to do this on my 9.9 ( stock shock crapped out) but Iím struggling to picture how it works. Did your shock have 10mm mounting hardware to match the bearings on the frame or do you have some clever bushings to reduce the bearing id to 8mm? Donít suppose you took any photos of the bits b4 you fitted?

  27. #227
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    Quote Originally Posted by ChomperNZ View Post
    Hi, Iím looking to do this on my 9.9 ( stock shock crapped out) but Iím struggling to picture how it works. Did your shock have 10mm mounting hardware to match the bearings on the frame or do you have some clever bushings to reduce the bearing id to 8mm? Donít suppose you took any photos of the bits b4 you fitted?
    I am in process of installing the DPX2 210 X 55mm on my 2018 9.9 and let me tell you it's been a pain in the ass figuring out all the hardware!!

    Since the 210 X 55mm is not Trek specific it did not come with any mounting hardware so I had to order that which ran about $42 for top & bottom.
    You will need 10 X 59.94mm kit for the top and 10 X 49.9mm for the bottom. I have not received the parts yet so I cannot confirm if they work yet.
    The 2018 9.9 is 10mm truunion mounting top & bottom where the 9.8 and below models are 8mm on the bottom for 2017 and older. I believe the 2018 9.8 and newer now use truunion top & bottom....

    You will also need 2 of the 9.8 top mounting bolt kits which run about $38. I got those ordered yesterday.
    Part number is: 540755.
    The bottom bolt you will have to cut about 10mm off then end of it, then tap some more threads inside of it.

    Also, you have to make sure to mount the bottom of the shock at a 10mm offset towards the drive side so I'm assuming the spacer that comes with the mounting kit for the bottom won't work. I am going to call Fox today to see if they have a specific kit for Trek to get the offset on the bottom......

    I will keep this thread updated once I receive all parts and get the shock mocked up on the bike!
    Last edited by Awhitt82; 05-22-2019 at 09:42 PM.

  28. #228
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    Quote Originally Posted by Awhitt82 View Post
    I am in process of installing the DPX2 210 X 55mm on my 2018 9.9 and let me tell you it's been a pain in the ass figuring out all the hardware!!

    Since the 210 X 55mm is not Trek specific it did not come with any mounting hardware so I had to order that which ran about $42 for both.
    You will need 10 X 59.94mm kit for the top and 10 X 49.9mm for the bottom. I have not received the parts yet so I cannot confirm if they work yet.
    The 9.9 is 10mm mounting top & bottom where the 9.8 and below models are 8mm on the bottom.

    You will also need 2 of the 9.8 top mounting bolt kits which run about $38. I got those ordered yesterday.
    Part number is: 540755.
    The bottom bolt you will have to cut about 10mm off then end of it, then tap some more threads inside of it.

    Also, you have to make sure to mount the bottom of the shock at a 10mm offset towards the drive side so I'm assuming the bushing that comes with the mounting kit for the bottom won't work. I am going to call Fox today to see if they have a specific kit for Trek to get the offset on the bottom......

    I will keep this thread updated once I receive all parts and get the shock mocked up on the bike!
    Exactly.

    NOTE: If you go the "cheapo" bolt and nut route of mine that is quoted above for the shock bottom, take GREAT care not to over-tighten them. Loctite and very gentle tightening is required, so as not to damage that beautiful carbon 9.9 swingarm. The Trek top bolt, when shortened for bottom use, eliminates this concern by its design.
    Whining is not a strategy.

  29. #229
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    Quote Originally Posted by Awhitt82 View Post
    Since the 210 X 55mm is not Trek specific it did not come with any mounting hardware so I had to order that which ran about $42 for top & bottom.
    You will need 10 X 59.94mm kit for the top and 10 X 49.9mm for the bottom. I have not received the parts yet so I cannot confirm if they work yet.
    Received the mounting hardware from Fox today and I can confirm that the lower kit DID COME with the correct spacers to offset it by the 10mm!!!

    Upper kit part number: 803-03-231
    Lower kit part number: 803-03-228

  30. #230
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    So it looks like the Fox now offers every shock in 210x55, so whats everyone's thoughts on the DHX2

    https://www.ridefox.com/family.php?m=bike&family=dhx2

  31. #231
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    Just added a DPX2 to my 2018 Fuel EX 9.9 and it was quite simple!

    The Fox P/N is: 973-61-017. This is for latest 210 x 52.5 factory 3 position shock tuned for the Treks (medium compression, light rebound) It includes the correct mounting hardware EXCEPT the upper and lower bolt kits - these you purchase from Trek for ~ $30.00 for the two kits:

    Trek Upper P/N: 540755
    Trek Lower P/N: 540756

    1) Loosen the main pivot axle a turn or two.
    2) Remove shock, (you will not be reusing the 4 shock mounting bolts or 2 washers)
    3) Install the new shock with Fox supplied shafts & delrin spacers and Trek supplied hardware.
    4) Re tighten the main pivot axle.

    Now all that's left is tuning (sag, rebound & low speed compression) Also, it ships with a 0.6 spacer installed but you could always purchase Fox volume spacer kit P/N: 803-01-251

    Easy as cake!!!

  32. #232
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    Quote Originally Posted by FullyAutoMattic View Post
    So it looks like the Fox now offers every shock in 210x55, so whats everyone's thoughts on the DHX2

    https://www.ridefox.com/family.php?m=bike&family=dhx2
    Looks sick! I would def go for it if I didn't already grab a super deluxe. But if somehow I can get a take off or deal on one I'd consider it.

  33. #233
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    2020 DPX2 210x52.5

    Exceeded my expectations. Like others have said here, completely transformed the bike.

    I was having new bike itch. Like I posted earlier, was getting along with the RE:aktiv shock, but on longer rides, it was becoming overwhelmed and felt harsh.

    Even though the FEX is highly capable (first time in Moab a couple of months ago, handled everything with no problem), started thinking about getting a new longer travel bike for a plusher more comfortable ride. I was looking at the La Sal Peak and the new YT Jeffsy pro race.

    Not anymore, the DPX2 is excellent. It has great mid-range support, and is highly adjustable, I replaced the stock performance fork with a 140mm Performance Elite fork that was writing checks that the RE:aktiv couldn't cash. The FEX is now more of a hover bike, but the DPX2 does not wallow at all.

    Broke several PR's on the first test ride that I had set several years ago. 3 descent segments and 2 climbing segments, both rocky with several technical sections.

    I was surprised at the recent thread complaining about the pedaling/climbing performance of the FEX. Not my experience at all. The RE:aktiv was a pretty good shock in that respect, the DPX2 is even better.

    Replaced the .6 spacer with .4
    225 psi, 4 clicks in LSC from open.
    6 clicks of rebound damping from open.

    Riding weight, 190#

    DPX2 for 17/18 Fuel EX?-2mo2omc.jpg


    DPX2 for 17/18 Fuel EX?-zn0sww.jpg
    2020 Turbo Levo SL Expert Carbon

  34. #234
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    Quote Originally Posted by carbonpaul View Post
    Just added a DPX2 to my 2018 Fuel EX 9.9 and it was quite simple!

    The Fox P/N is: 973-61-017. This is for latest 210 x 52.5 factory 3 position shock tuned for the Treks (medium compression, light rebound) It includes the correct mounting hardware EXCEPT the upper and lower bolt kits - these you purchase from Trek for ~ $30.00 for the two kits:

    Trek Upper P/N: 540755
    Trek Lower P/N: 540756

    1) Loosen the main pivot axle a turn or two.
    2) Remove shock, (you will not be reusing the 4 shock mounting bolts or 2 washers)
    3) Install the new shock with Fox supplied shafts & delrin spacers and Trek supplied hardware.
    4) Re tighten the main pivot axle.

    Now all that's left is tuning (sag, rebound & low speed compression) Also, it ships with a 0.6 spacer installed but you could always purchase Fox volume spacer kit P/N: 803-01-251

    Easy as cake!!!
    Iím swimming in part numbers

    Fox told me 963-61-012, and Iíve seen 963-61-017 and 973-61-017 for sale claiming to be a Trek-specific set up.....can someone shed some light on this?

    Mike


    Sent from my iPhone using Tapatalk

  35. #235
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    FWIW I think I have my answer: 973-61-017 is last year's (2019) part number. Shock is the same, according to Fox rep.

    Pro Bike Supply has this on sale for $474

  36. #236
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    Anyone know if you can mod the existing shock to remove the reactiv tune?

    Sent from my SM-G930F using Tapatalk

  37. #237
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    Quote Originally Posted by VERT1 View Post
    Anyone know if you can mod the existing shock to remove the reactiv tune?

    Sent from my SM-G930F using Tapatalk
    Yes, check out Avalanche Racing. I'd like to get mine modified, but will have to wait till the off season.

  38. #238
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    Hi, so the shock came with bushes, mounts and spacers to suit the 10mm bolt you got from Trek?

  39. #239
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    Quote Originally Posted by ChomperNZ View Post
    Hi, so the shock came with bushes, mounts and spacers to suit the 10mm bolt you got from Trek?
    Quote Originally Posted by carbonpaul View Post
    Just added a DPX2 to my 2018 Fuel EX 9.9 and it was quite simple!

    The Fox P/N is: 973-61-017. This is for latest 210 x 52.5 factory 3 position shock tuned for the Treks (medium compression, light rebound) It includes the correct mounting hardware EXCEPT the upper and lower bolt kits - these you purchase from Trek for ~ $30.00 for the two kits:

    Trek Upper P/N: 540755
    Trek Lower P/N: 540756

    1) Loosen the main pivot axle a turn or two.
    2) Remove shock, (you will not be reusing the 4 shock mounting bolts or 2 washers)
    3) Install the new shock with Fox supplied shafts & delrin spacers and Trek supplied hardware.
    4) Re tighten the main pivot axle.

    Now all that's left is tuning (sag, rebound & low speed compression) Also, it ships with a 0.6 spacer installed but you could always purchase Fox volume spacer kit P/N: 803-01-251

    Easy as cake!!!

    Hi, so the shock came with bushes and spacers to suit the 10mm bolts you got from Trek?

  40. #240
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    Anyone know what a DLGM tune would be on a DPX2? Good match for an FEX?

  41. #241
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    Quote Originally Posted by not2shabby View Post
    Anyone know what a DLGM tune would be on a DPX2? Good match for an FEX?


    Not sure what dlgm means but revalving is around 150 at fox. If you're thinking about getting a dpx2 I would probably recommend just getting the correct size off eBay and revalving it's something you like. I just tried the new 2020 fuel ex specific dpx2...and... it sucks. It's a brick. Part of the problem is the tune and the other issue is just the way this shock works. When you start tightening up the rebound it effects the compression . I was actually able to get it to perform the best with very little rebound. And very little compression which made it a bit of a handful. Needed to slow it down. Keep in mind I'm about 200 pounds with a Camelbak so it's not like I'm a super lightweight guy. Factory spacer also was way off. The .6 was way way too big. You never got full travel and it ramped up hard at the bottom. I spoke to Ed over at Fox who is one of their lead guys or the lead guy. He was all about cla004 for the tune when I mentioned wanting more control and the ability to tune out the abrupt nature of what is stock. also mentioned they have a new one they just developed for Santa Cruz if someone wants a really fast acting shock.

    I think if someone is a really big person or if they are an XC rider they will probably like the stock tune. I just could not get it to be compliant for the life of me without having to back everything off. Made it hard to carry speed.

    I should know how cla004 rides in a few days as that shock is due to be delivered anyday now

    Lastly, one thing to keep in mind with my feedback is I gave Ed specific details on what was bothering me to arrive at the conclusion that we did. This may or may not be the case for other people

  42. #242
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    What is the tune on the one you don't like?

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  43. #243
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    Quote Originally Posted by not2shabby View Post
    Anyone know what a DLGM tune would be on a DPX2? Good match for an FEX?
    It looks like it's from a Ripmo?

    https://www.ridefox.com/fox17/help.p...ref=findbycode
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  44. #244
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    Not sure, he said he bought it for a build but never used it. I made an offer...too good a deal to pass up, even if it needs a little tweeking.

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  45. #245
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    Quote Originally Posted by Xtatic77 View Post
    Got mine installed on my '16 Fuel EX 7. Not sure how you guys managed the through bolt on top or what you used..but i had to drill cut and get pissed off about 503908282 times before i got it to work after visiting hardware store... pain in my ass..all i gotta say..
    Click image for larger version. 

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    I'm not sure how different the '17' and up FEX's are, but I'm surprised you got it installed on a '16'. Did you check for clearance with no air pressure and the suspension fully compressed? It sounds like you may have compromised the frame and/or linkage if you had to drill and cut anything. Good luck.

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  46. #246
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    Quote Originally Posted by not2shabby View Post
    What is the tune on the one you don't like?

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    dx63

    it's the tune code for the new 2020 part number on the fuel ex specific shock. the dpx2 has a design flaw with the rebound affecting compression. if you get the tune right for the rider and the bike it can still flow with the bike and behave well with the fork. typically i set bikes up with the fork being every so slightly stiffer than the shock. this keeps the bike balanced when you brake hard into corners and turn. if the rear shock is too stiff you not only lose traction it can buck you forward.

    i also have a dpx2 on my bronson and it was easy to get right with a grip2 36 fork. it could be the trek full floater design and this shock just not getting along but i'm giving a different tune a go whenever it shows back up.

    also figured out what you meant by DLGM it's an ibis tune code on a dpx2. there's no real way to tell how those will behave looking at what's posted. internally fox has a LOT of different tunes that fall under various categories. you just have to ride them and see what you think. can you get the shock to be compliant and not jar you but at the same time controlled and only bottom out on good size jumps? in my experience when the tune is wrong no matter what you try it's hard to get to feel right. you may need 35-40% sag to get it to flow which of course won't work for support or hard hits. it may feel too fast like you blow through travel easy and adjustments just make it more jarring but the control still isn't there.

  47. #247
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    Anyone running a Ripmo take off and how do you like it?

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  48. #248
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    Quote Originally Posted by not2shabby View Post
    Anyone running a Ripmo take off and how do you like it?

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    Best upgrade Iíve done to my bike!!


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  49. #249
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    Saweet! Just sent payment, now the waiting begins...

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  50. #250
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    Ok, let's see if I've got this right...on my EX8, I should be able to just remove the stock shock and use the same hardware to mount the DPX, right?

  51. #251
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    Quote Originally Posted by not2shabby View Post
    Ok, let's see if I've got this right...on my EX8, I should be able to just remove the stock shock and use the same hardware to mount the DPX, right?
    I got mine new from Pro Bike Supply, and one of the bushings had the wrong internal diameter, but it was no problem switching it out with the stock piece. Shouldn't be any issues you can't solve in your garage.

    Congrats....it's a substantial upgrade, IMO

  52. #252
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    I have been running a 2020 DPX2 210X55mm for a few months now on my 2018 FEX 9.9 and I am loving it!
    Shock code is DQM4 which comes out to a 0.2 spacer, compression medium, digressive rebound medium and Rezi AFM+ which I'm not really sure what that means....
    I'm about 175lbs geared up and currently running 210psi to get about 14mm sag which is 25%. Rebound is at 8 clicks out and open mode adjust 5 clicks from fully open.
    Definitely glad I switched out the shocks!

  53. #253
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    Mine is definitely a Ripmo take off and from what I can tell has a .4 spacer. Not sure what comp/Reb. Hopefully it'll work well. Of course I won't get it till after the long weekend!

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  54. #254
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    One more question, are you guys finding improvement in climbing as well as descending? Trek had a local demo day last weekend and I got a lap in on a '19' Remedy 9.8 and was really surprised it climbed a bit better than my bike! It's probably a couple lbs lighter and had Eagle 12 speed, so gearing was probably different too, plus having 27.5 wheels so not comparing apples to apples but still...
    I don't notice any pedal bob while climbing in the saddle with the reaktiv shock in trail mode but do if standing and hammering. Would be nice if the DPX2 is better.
    Wish I had waited for the Slash to come back in, but time was an issue.

  55. #255
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    Just got back from a ride and I gotta tell ya, the DPX2 will have to be a really good shock to be better than the stock reaktiv. It works pretty well I think, the only time I really notice it is going down fast over big roots and rocks. Then it can get a bit overwhelmed, but not too bad. I can deal with the rear getting a bit loose as long the fork goes where I want it. The Yari with an Avi cart and 150mm new debonair spring is simply incredible. The only time it gets off line is over wet slippery roots and that's the tires fault.
    I made one slight adjustment to the handlebars before the ride; I rotated them back a few degrees so they're flatter. Made a huge difference in climbing! Much easier.

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  56. #256
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    If anyone is interested, I have a DPX2 for the Fuel I bought in April. I've decided to sell the bike, but will sell the shock separate, for $300. Bought it from Probike in April. Probably has a couple hundred miles on it. PM me if you're interested.

    BTW: it greatly improved how the bike rides. I'm always a little skeptical of upgrades, but I set a bunch of PRs after installing it.

  57. #257
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    Sorry for the thread jump but has anyone here rebuilt the OEM Reaktiv shock on a '17/'18/'19 FEX themselves? Is it as simple as rebuilding any Fox Float model?

  58. #258
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    Quote Originally Posted by Hawgzilla View Post
    Sorry for the thread jump but has anyone here rebuilt the OEM Reaktiv shock on a '17/'18/'19 FEX themselves? Is it as simple as rebuilding any Fox Float model?
    Are you asking about a simple seal kit and fluid refresh service, or a complete damper rebuild?

    Yes to the former.
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  59. #259
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    Quote Originally Posted by mlx john View Post
    Are you asking about a simple seal kit and fluid refresh service, or a complete damper rebuild?

    Yes to the former.
    Thanks for your reply.

    Just a simple seal and fluid refresh kit.

    Would I order the kit through Trek or Fox?

  60. #260
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    I've read in here that some of you fell that the OEM shock becomes overwhelmed in the consistent rough sections. (I'm a flip switcher, always adjusting the 3-way setting during the ride.)

    Is this the case with the shock set to OPEN? If so, why is the DPX2 better in this case?

  61. #261
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    From Fox:

    "X2 ARCHITECTURE
    Taking the oil flow architecture from the FLOAT X2 and DHX2 designs, the DPX2 is the X2ís little brother. This system creates low hysteresis, quick hydraulic response, better sensitivity and improved heat dissipation. It also provides a wide, usable tuning range and checked low-speed compression and rebound flow paths for better tuning and consistent performance."


    It has transformed my '17 Fuel EX into a different bike. More glued to the ground, and still plush 3+ hours in, where the OEM shock would start to feel pretty harsh. Key phrases from the above paragraph are " oil flow architecture... low hysteresis...improved heat dissipation"

    You can order the seal kit from just about anywhere online-Jenson,amazon, etc.

    https://www.amazon.com/SHIPS-HOURS-F...55595793&psc=1

    Here's a simple tutorial from Fox if needed:

    https://www.ridefox.com/fox17/help.php?m=bike&id=570
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  62. #262
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    Quote Originally Posted by Hawgzilla View Post
    I've read in here that some of you fell that the OEM shock becomes overwhelmed in the consistent rough sections. (I'm a flip switcher, always adjusting the 3-way setting during the ride.)

    Is this the case with the shock set to OPEN? If so, why is the DPX2 better in this case?
    Stock reactiv shock on my 2017 9.9 was terrible. Way way too loose. Bike was uncontrolled at high speed. I switched that to a med med dps valving in that can as soon as possible. As for the dpx2. The dx63 label or 2020 fuel ex version sucked off the shelf. I'm now testing valve pack cla004 and going to report back to fox next week. my impression so far is.....This valve pack works. Wide range of adjustment and very controlled but also forgiving. You can get it to dance with the fork well where as dx63 was very jarring and you had very very little adjustment before it clamped down. Very stiff and rode like an xc shock unless you rode it basically open, like zero to 1 compression and under 4 rebound. Going to recommend cla004 as the revised stock tune for an off the shelf fuel ex dpx2. Much better in feel. Traction and compliance. this thing is fast now. a light rider has a LOT of adjustability and a heavier one can actually get some adjustment to blend it with the fork

  63. #263
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    I don't know all the tech details, but it felt to me that the DPX2 stays in the mid range of travel more and feels supportive throughout its travel. The Reactiv was stiff or mushy with no little or no happy medium in between.

  64. #264
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    Is there a trick to getting the black spacers off the metal rod that runs through the eyelets? I just pulled the stock shock off while waiting for the DPX to arrive tomorrow.

  65. #265
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    Quote Originally Posted by not2shabby View Post
    Is there a trick to getting the black spacers off the metal rod that runs through the eyelets? I just pulled the stock shock off while waiting for the DPX to arrive tomorrow.
    they can be tight. simple garage way to do it is wrap the black plastic with tape and if it's not super tight use a vice, gently tighten down and wiggle it off

    if it's tight you will want something to fit in one side to start pushing the metal tube and the other side in a deep well socket so that inner tube presses out. usually it takes very little pressure to get them apart. don't use sharp gougy things as you experiment btw

    which valve pack are you trying on your dpx2?

  66. #266
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    I got them off, wrapped a piece of inner tube around it and clamped it in the vise and a twisting worked. That metal in the bottom of the Ripmo take off shock was a pita. Had to take a rat tail file and careful file through one side to weaken it enough to punch out. Anyway, got it installed last night and set up sag... took about 250psi to get about 15mm sag. I only weigh about 175 so it seems like pretty high pressure compared to what others are running. I'm pretty sure the negative chamber is equalized. It's a performance series w/o the lsc adjuster. I noticed the air can is longer and thinner than the stock shock and the dpx uses all the shaft travel to get 55mm where the stock shock stopped well short of the end of the shaft.
    Can't wait to give it a trail ride. It felt good hitting the curbs in front of the house this morning!

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  67. #267
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    Oh, it's the dlgm Ripmo tune.... whatever that is! Hopefully it'll work well with the fuel frame.

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  68. #268
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    It was easier to wheelie this morning! In trail mode. I usually left the stock shock in trail mode most of the time.

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  69. #269
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    Quote Originally Posted by not2shabby View Post
    It was easier to wheelie this morning! In trail mode. I usually left the stock shock in trail mode most of the time.

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    Don't be afraid to increase the sag. If you really downhill and notice it's not maintaining traction or bucking you forward. If you have the fork at 20% sag the rear between 30 and 35% has been the fastest combo I have experimented with.

  70. #270
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    Just got back from the first ride.... nice!
    I screwed the shock pump on before leaving to see if the pressure was still at 250 and it was down to 190. I think riding around the hood the other day equalized the negative chamber. I gave it a few pumps and set it to 200 psi and checked the sag. Right about 30%. I kept switching from open to trail to feel the difference. Open is super plush but still quite supportive while climbing. Trail is just a tad less plush, but easier to climb in. Tough choice really... Going down, open is the bomb! Trail ain't bad either. Again, tough choice. Too many quick ups and downs at Alum creek to be switching back and forth. Neither is a bad choice. Both are better than the stock shock, hands down. The ride is more controlled and inspires going faster. I used almost all the travel at both ends. Before, I'd always have about an inch left on the fork, but today only about half an inch remained. Only about 5-6mm was left on the shock. I played with the rebound and ended up only 2 clicks out from max. Didn't feel any packing down, shock was always ready for the next root or rock. No pedal strikes either. There's a few drops about 3 foot, one to flat that you can hit pretty fast and the landing was smoother than ever. Pumping was more efficient too, speed going up the other side of ravines was higher. Money well spent and I'm one happy camper!

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  71. #271
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    not2shabby -

    Your review echos what I think about my Factory DPX2 on the FEX8. Really didn't know what I was missing, because the stock shock was super, super -- um -- adequate. The DPX and a 140mm 2018 Pike up front really bring out the best qualities of the platform. Diggin' it!

  72. #272
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    Exactly...adequate! I didn't really have any complaints about it, but glad I finally upgraded. Like they say, the best you've ridden is the best you know.

  73. #273
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    Quote Originally Posted by not2shabby View Post
    Exactly...adequate! I didn't really have any complaints about it, but glad I finally upgraded. Like they say, the best you've ridden is the best you know.
    Yes. As an intermediate to advanced (but not expert) rider, I'm not as discriminating as many reviewers. Yet, on my 2017 Fuel EX 9.8 I noticed the difference immediately. The bike felt plusher, it stuck to the ground better and absorbed bumps better than the stock shock. Even after upping the psi when I had too low on the first ride, the sensation remained. For me, it was a better shock.

  74. #274
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    I'm on the fence about making the upgrade. The OEM shock is super plush in OPEN and not bad in TRAIL. The only thing I have noticed, as others have said, is that the OEM shock becomes overwhelmed in constant rough chatter/hits. But that type of terrain is limited here, it's mostly XC so I am not sure that making the switch is necessary. If I happen to find a deal that I cannot pass up, I may go this route. We shall see.

    Thanks to everyone who has supplied feedback. Great to hear your experiences/opinions/remarks.

  75. #275
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    Quote Originally Posted by racebum View Post
    Stock reactiv shock on my 2017 9.9 was terrible. Way way too loose. Bike was uncontrolled at high speed. I switched that to a med med dps valving in that can as soon as possible. As for the dpx2. The dx63 label or 2020 fuel ex version sucked off the shelf. I'm now testing valve pack cla004 and going to report back to fox next week. my impression so far is.....This valve pack works. Wide range of adjustment and very controlled but also forgiving. You can get it to dance with the fork well where as dx63 was very jarring and you had very very little adjustment before it clamped down. Very stiff and rode like an xc shock unless you rode it basically open, like zero to 1 compression and under 4 rebound. Going to recommend cla004 as the revised stock tune for an off the shelf fuel ex dpx2. Much better in feel. Traction and compliance. this thing is fast now. a light rider has a LOT of adjustability and a heavier one can actually get some adjustment to blend it with the fork

    Hi, do you know if theres a difference between the 2019 and the 2020 fex dpx2's? I ordered a shock from the lbs and gave them the part number for the 2020 fex 210x52.5 but asked for the same tune in a 210x55 for a little extra travel, they've sent me a 2019 shock altered to 210x55. Reading your posts im not sure if I should stick with it or swap it for a different tune, your thoughts?

    Either way its gotta go back because the piggy back cover is on 180deg wrong...

  76. #276
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    Quote Originally Posted by Hawgzilla View Post
    I'm on the fence about making the upgrade. The OEM shock is super plush in OPEN and not bad in TRAIL. The only thing I have noticed, as others have said, is that the OEM shock becomes overwhelmed in constant rough chatter/hits. But that type of terrain is limited here, it's mostly XC so I am not sure that making the switch is necessary. If I happen to find a deal that I cannot pass up, I may go this route. We shall see.

    Thanks to everyone who has supplied feedback. Great to hear your experiences/opinions/remarks.
    Going out on a limb here, but I'd say yes. Climbing in trail mode feels plusher and more controlled than the stocker. In trail mode I couldn't detect any pedal Bob even standing and hammering and it's still pretty plush. And if you ever take your bike on vacation and hit some rougher trails, you'll be glad to have it. I waited and got one really cheap off pinkbike.
    My dpx2 is a Ripmo take off and I weigh around 175 RTR. The tune on the Trek specific models is probably different. Something to keep in mind.
    I do wonder now how much better it might be if I sent it in to Craig at Avalanche. My Yari with an Avi cartridge is amazing. The dpx2 is close to matching it now. I'm close to maxed out on rebound is the only thing.

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    Last edited by not2shabby; 09-08-2019 at 07:06 PM.

  77. #277
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    Quote Originally Posted by ChomperNZ View Post
    Hi, do you know if theres a difference between the 2019 and the 2020 fex dpx2's? I ordered a shock from the lbs and gave them the part number for the 2020 fex 210x52.5 but asked for the same tune in a 210x55 for a little extra travel, they've sent me a 2019 shock altered to 210x55. Reading your posts im not sure if I should stick with it or swap it for a different tune, your thoughts?

    Either way its gotta go back because the piggy back cover is on 180deg wrong...
    I don't. There are so so many tunes fox actually has for this shock. I have ridden a few on the dps shock and dpx2. On the 2017 to 2019 fuel ex tune cla004 is really really good. Feels light but it gives you the option of adjustment. Some of the heavier tunes get very rough with very little compression or rebound increase. I rode an enduro course on cla004 and loved it. It you cranked compression it could also do xc. I'm 210lbs with pack and rode at 200lbs pressure. 4 clicks compression 6 clicks rebound. On the stock dx63 which currently is the 2020 tune I could not get above 1 compression without it getting jarring causing a loss of traction on rapid rock drop / root sections. Rebound also tightened down on compression more than I liked above 3 or 4 This is a design flaw of the dpx2 but isnt a problem if the tune is close for the frame..the thing I love most about this tune is it is compliant but does not feel loose or wobbly on hard hits also used the .2 vol spacer

    By the way there's no such thing as the piggy back cover being on wrong. Just twist the lower shaft 180 degrees. It freely spins around in there and now it's pointing the right direction

  78. #278
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    Just got back from ride number 2. I went to Alum creek p1 this time, it doesn't have any drops to speak of, but has tons of big ass roots and a few flowy sections and a few really steep ups and downs with lots of roots. The kind of crap that can catch a wheel and kill your momentum. Again I went back and forth from open to trail and tried less rebound too. At p1 I ended up liking open position with 3 clicks out on rebound. Open seems to give the best traction while climbing over the big roots and more control and comfort flying down over them. I'll take the bit of extra effort it takes climbing for the increased traction. On the stock shock, I'd get stalled out occasionally on the big roots while climbing, but today just cruised right over all of them. Same deal going down, no more rear end bouncing off line. I'll no doubt play with settings some more, but for now open is winning.
    Didn't come close to using all the travel at either end today.

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    Last edited by not2shabby; 10-15-2019 at 08:01 PM.

  79. #279
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    Quote Originally Posted by not2shabby View Post
    Just got back from ride number 2. I went to Alum creek p2 this time, it doesn't have any drops to speak of, but has tons of big ass roots and a few flowy sections and a few really steep ups and downs with lots of roots. The kind of crap that can catch a wheel and kill your momentum. Again I went back and forth from open to trail and tried less rebound too. At p1 I ended up liking open position with 3 clicks out on rebound. Open seems to give the best traction while climbing over the big roots and more control and comfort flying down over them. I'll take the bit of extra effort it takes climbing for the increased traction. On the stock shock, I'd get stalled out occasionally on the big roots while climbing, but today just cruised right over all of them. Same deal going down, no more rear end bouncing off line. I'll no doubt play with settings some more, but for now open is winning.
    Didn't come close to using all the travel at either end today.

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    Do you have any idea which volume spacer is in it? If you're not using full travel you can definitely reduce those which keeps the shock from ramping up at the bottom part of the travel. If the sag is somewhere around 30% or even as much as 35% and you're still not using all the travel that volume spacer is too big

    You also picked up on something that is inherent to the fuel ex geometry.

    Depending on which valve pack you happen to have that makes a ton of sense with the rebound. If the shock is valved a little bit too tight you're kind of forced to run it towards the loose end of the spectrum to maintain compliance. Like maybe just a click or two from Full fast as tightening it up makes the bike either pack down or become too jarring.

    You may notice comments where someone says I can only use a couple of clicks of compression or rebound and someone else that says they have it maxed out. That's the enormous difference in valve packs this shock can be built with. Some are definitely much much better than others for this Frame

  80. #280
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    Quote Originally Posted by racebum View Post
    Do you have any idea which volume spacer is in it? If you're not using full travel you can definitely reduce those which keeps the shock from ramping up at the bottom part of the travel. If the sag is somewhere around 30% or even as much as 35% and you're still not using all the travel that volume spacer is too big
    Exactly. IIRC, somebody posted that the Ripmo DPX2 comes with a 0.4 VR. If so, just remove it, and report back. Or, if you own a set of VRs, throw in a 0.2.

    In the No Free Lunch category, this may result in needing to use the Trail setting a bit more frequently, to keep from going too deep into the travel when climbing.

    In any event, it's a free, 10 minute experiment. You don't even need to remove the shock on the FEX.
    Whining is not a strategy.

  81. #281
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    I haven't checked but the Ripmo take off is supposed to have a .4 spacer and a light comp/ med rebound tune. Yesterday I had it mostly in trail mode and only 2 clicks out from fully slow on rebound. Used all but about 5-6 mm of travel due to the drops at p2. Today I was running mostly open and 3 clicks out from full on rebound. Any more and it started feeling a little too fast.
    Having a medium rebound, I'd think I should be able to run it more towards the middle of the range, but it doesn't feel right. I only weigh 175. At least I don't have to max it to get it working. Maybe after some more break in time I'll be able to back it off a few clicks. If not, nbd. Definitely happy with the way it rides now

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  82. #282
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    Forgot to mention, there were a couple times today when crawling up over roots I almost came to a stop but was able to just power over it due to rear hooking up like crazy. I'd bet a million bucks the stock shock would have lost traction and I would have stalled. Almost feels like cheating.

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  83. #283
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    Quote Originally Posted by not2shabby View Post
    I haven't checked but the Ripmo take off is supposed to have a .4 spacer and a light comp/ med rebound tune. Yesterday I had it mostly in trail mode and only 2 clicks out from fully slow on rebound. Used all but about 5-6 mm of travel due to the drops at p2. Today I was running mostly open and 3 clicks out from full on rebound. Any more and it started feeling a little too fast.
    Having a medium rebound, I'd think I should be able to run it more towards the middle of the range, but it doesn't feel right. I only weigh 175. At least I don't have to max it to get it working. Maybe after some more break in time I'll be able to back it off a few clicks. If not, nbd. Definitely happy with the way it rides now

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    This is one of the crazy Parts about the dpx2. Rebound effects compression but compression doesn't really affect rebound all that much. The way the oil flows through that thing is the reason why so years ago when they would say medium this or light that it actually meant something. Today it almost doesn't because they have so many different Tunes and they just kind of broadly throw them into categories so people understand roughly what they have. Depending on how you set up the shock they may or may not behave like you expect them to.

    The happy medium is when you can get it to feel exactly like the fork. Like when you hit a rock drop and the fork and the shock are doing the same thing. They feel nearly identical and if anything the rear end is just ever so slightly softer which promotes slack in the front end, stable steering and weight balance

    If you're able to go over a really rooty section quickly and the shock is able to recover in between hits the rebound isn't quite as medium as others may be since fox has countless tunes that all fall under that same label

    Lastly those of you looking it upgrades have to consider what you want the bike to feel like. I have met people that like the rear end to feel more like a hardtail and really stiff and others that want it to feel completely balanced with the front and have more of a Cadillac Vibe when they hit rough sections. These are obviously two different goals which are going to require potentially two different shocks

  84. #284
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    I don't know for 100% sure it's a medium reb tune, someone earlier in the thread said it's light comp/med reb, but not sure where he got the info. The .4 spacer I'm pretty sure about and after riding P2 and using almost all the travel at both ends I'm leaving it in.
    Right now the shock is just a bit softer than the fork on comp and just about the same on rebound. I did the 'bounce on the pedals' test and both ends go up and down in unison. I got away with some stuff today that surprised me, both up and down. Was tired when I started riding and by the end got a little sloppy with line choice and the bike just ate it up. Cornering also feels a bit more accurate on the flowy curves.

  85. #285
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    Quote Originally Posted by racebum View Post
    I don't. There are so so many tunes fox actually has for this shock. I have ridden a few on the dps shock and dpx2. On the 2017 to 2019 fuel ex tune cla004 is really really good. Feels light but it gives you the option of adjustment. Some of the heavier tunes get very rough with very little compression or rebound increase. I rode an enduro course on cla004 and loved it. It you cranked compression it could also do xc. I'm 210lbs with pack and rode at 200lbs pressure. 4 clicks compression 6 clicks rebound. On the stock dx63 which currently is the 2020 tune I could not get above 1 compression without it getting jarring causing a loss of traction on rapid rock drop / root sections. Rebound also tightened down on compression more than I liked above 3 or 4 This is a design flaw of the dpx2 but isnt a problem if the tune is close for the frame..the thing I love most about this tune is it is compliant but does not feel loose or wobbly on hard hits also used the .2 vol spacer

    By the way there's no such thing as the piggy back cover being on wrong. Just twist the lower shaft 180 degrees. It freely spins around in there and now it's pointing the right direction
    Thx for the information. I'm not sure how they've done it but yeah all the stickers on the air can and piggy back are 180deg wrong. The gap in the stickers that should be hidden are front on as you look at it, ( the x2 sticker on the piggy back is facing the air can)

  86. #286
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    Quote Originally Posted by Hawgzilla View Post
    I'm on the fence about making the upgrade. The OEM shock is super plush in OPEN and not bad in TRAIL. The only thing I have noticed, as others have said, is that the OEM shock becomes overwhelmed in constant rough chatter/hits. But that type of terrain is limited here, it's mostly XC so I am not sure that making the switch is necessary. If I happen to find a deal that I cannot pass up, I may go this route. We shall see.

    Thanks to everyone who has supplied feedback. Great to hear your experiences/opinions/remarks.
    Well, here's one more bit of food for thought: The lockout position on the stock shock was actually more effective than that of the DPX2, which will still compress a fair amount with max compression set. It's not a true lockout. Sooooo, if that's important to you in your "mostly XC" environment, then you might be happier with the stock unit. It's lighter, too, if nothing else.

  87. #287
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    Quote Originally Posted by MikeInPA View Post
    Well, here's one more bit of food for thought: The lockout position on the stock shock was actually more effective than that of the DPX2, which will still compress a fair amount with max compression set. It's not a true lockout. Sooooo, if that's important to you in your "mostly XC" environment, then you might be happier with the stock unit. It's lighter, too, if nothing else.
    The (climb) position on the OEM shock is not a true lockout either. But it's plenty stiff enough for pavement riding which is where I set the shock when I ride to the dirt from home. Even true lock out shocks have a blow-off valve that activates on hard hits. I appreciate a little give because it's easier on my old, arthritic joints.

    Thanks for your input.

  88. #288
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    Quote Originally Posted by Hawgzilla View Post
    The (climb) position on the OEM shock is not a true lockout either. But it's plenty stiff enough for pavement riding which is where I set the shock when I ride to the dirt from home. Even true lock out shocks have a blow-off valve that activates on hard hits. I appreciate a little give because it's easier on my old, arthritic joints.

    Thanks for your input.
    The climb position on the Reaktiv from my 9.9 was notably softer than it was on my DPX2.

    DPX2 was VERY firm, but mine was a 210 x 52.5 valved specifically for the FEX.
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  89. #289
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    Hmmm, I haven't tried the firm setting on the dpx2 yet, I'll have to check it out. The stocker was pretty firm.

  90. #290
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    Quote Originally Posted by kosmo View Post
    The climb position on the Reaktiv from my 9.9 was notably softer than it was on my DPX2.

    DPX2 was VERY firm, but mine was a 210 x 52.5 valved specifically for the FEX.
    Interesting.....I had the opposite experience. In any case, LOVE the DPX2!

  91. #291
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    Tried out the firm setting a while ago and it feels about the same as the stock shock did. I hardly ever used it though, so hard to say.
    When I plug in the shock code at ridefox, I get CEC001 and RLA014 for comp/Reb valve stacks. Scrolling down shows drawings with dimensions for the shims. I don't know enough about shim stacks to say for sure but the comp stack looks close to the med but doesn't have the one thin shim. The reb stack looks close to the linear reb med.
    Link to diagrams. Scroll down to bottom.
    https://www.ridefox.com/fox17/help.php?m=bike&id=970
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  92. #292
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    Has anyone figured out what the Rezi codes are? Mine is LFM.

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    @Racebum, you seem to be posting a ton on this topic and in all honesty I'm not sure that you're posting quality info based on your comments/suggestions and setup. ...

    -You're talking about stock REActiv shock being "too loose" (whatever that means) and "un-controllable". While it's not the best shock in the world and is under-gunned for fast/heavy riders, I know plenty of rippers who have complete 'control' of their bikes while riding it. And can shred the hell out of any trail system they ride.
    -You're telling people to run 35% sag on a FuelEX (wth?)
    -You're saying you weigh 210 lbs, run 30-35% sag with .2 volume spacer and the shock at 200PSI??!? And you're having a good experience(?!). You're obviously not riding fast/hard if you can get away with those settings and think the bike is performing well. I'm 155lbs geared up, run the same .2 volume spacer as you, but I'm at 220PSI for ~20-25% sag and still bottom the FuelEX out on hard hits at high speeds. Based on my numbers you should be around 275+PSI plus.

    You're obviously running the shock soft like a waterbed and bottoming it out like crazy if that's really how you run it, if you ride at any high level of speed. So, I'm sorry, but taking your reviews of shock tunes is a bit scary. Not attempting to be mean, but just saying.

  94. #294
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    It sure got quiet in here...
    155 lbs running a .2 spacer, 20-25% sag and you're still bottoming it out? Are you riding bike parks?

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  95. #295
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    Forgot to ask, what tune does your shock have?

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  96. #296
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    I went for a ride and tried running about 25% sag and the compression felt pretty good, but I didn't didn't have enough rebound damping even at 1 click out from max and was losing traction climbing over roots. Seems 30% sag is the lowest I can go unless I get the rebound reshimed.
    Even at 30%, I'm not bottoming out on what and where I ride (read old and slow!), So I'll leave it be for now.

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  97. #297
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    If you're not bottoming out at 30 % sag, why would you decrease it? Using all the travel is not a goal in itself if the shock works for you with higher sag than the thumb rule for the starting point

  98. #298
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    To answer your questions regarding my setup and provide some more info and feedback...
    -155lbs geared up, 220PSI if riding fast/rougher stuff. 215ish for XC, as low as 210 maybe. .2 spacer, 20-25% sag typically at 220psi. It is a Ripmo tune. I called fox and it has medium or high LSC stock and medium rebound.

    -Yes, I ride 'bigger mountain' stuff. In the past 3 months I've ridden Bellingham, Whistler, North Shore, Seattle region, etc. If I lived in Tampa Florida, I would never use more than 70% of travel with these settings unless I was riding off a loading dock. That's my point. If racebum weighs 200lbs+ and is running 30-35% sag with the same spacer he must be riding on super smooth trails with no drops and not riding high speeds (the biggest way to use travel fast is smashing into stuff at speed).

    -One thing people need to understand is that their shock pumps could be messed up as well. Most analog gauge shock pumps are garbage within 10psi. I have two digital pumps that I have validated pressures off of. I have 3 older analog pumps and all read inaccurate and differently when I hook them up to shocks.

    -People see marketing videos that they need 130mm or 150mm or whatever travel on a bike to shred trails. But they're watching marketing videos of absolute rippers riding steep, rooty, high speed trails. The average middle-aged user is moving at 1/3rd the speed on way tamer trails. If you have to run 30-35% sag on a Fuel EX to even get it to bottom, you either have too big of a volume reducer in there or you should be on a shorter travel bike for the best ride experience. 30-35% sag on a Fuel EX, that has only about 80% anti-squat, will feel like a waterbed. No support. It's not a DH bike, it needs to be pedaled.

    -Not2shabby: What pressure are you running in your shock??? I saw earlier you said you're at 200psi. If you're one click from maxed out on rebound damping you have completely ruined the suspension performance on the DPX2. That is way out of useable range at that air pressure. Your shock is not 'coming back' after hitting a bump. ... I can open my rebound up full fast at 220psi and have zero issues climbing anything. I think this is poor climbing technique being blamed on rebound damping. I don't mean that rudely, but it doesn't add up that it's shock related. You've got so much damping in that shock that it's not working correctly and is way out of spec. The shock has a max pressure chart of 300PSI and even at that level Fox recommends 2 clicks from full rebound damping. You're basically riding a hardtail after the shock hits the initial impact as it's not rebounding back.

    Please consult: https://www.ridefox.com/dl/bike/605-...white-revA.pdf
    Based on this chart and 200psi, you are 8-9 clicks 'out of optimal'. And Fox suggests not going more then 2 clicks in either direction of their target rebound settings. Looks like you're 6-7 clicks beyond their max suggestion.

    Thanks!

  99. #299
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    I have read the setup guide. My shock pump shows 200 psi, but as you said, they can be off. I get about 16mm sag which is close to 30%. Fox recommends 25-30% (firm-plush) for the DPX2 and since I haven't bottomed it out, no reason to run lower sag. Pedaling support is very good and the shock shows no sign of 'packing down', it's always ready for the next hit. While I haven't been mtbing for long, I have been riding motorcycles for a loooong time and know what too much/too little rebound feels like. Maybe somethings wrong with the adjuster, or it's still breaking in, IDK.
    My last ride I did try 25% sag just to experiment and stopped after about a mile and let a little pressure out because the rear was kicking up off roots. Higher psi overwhelming the rebound even more. Maybe I'll try removing the .4 reducer.
    I admit the Fuel is a bit overkill for where I ride, but I like having the bike take most of the beating instead of me at my age.
    Not trying to be a douche, but I have to ask why you're not on a Slash instead of the Fuel?

  100. #300
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    Last ride I removed the .4 spacer and upped the psi to 205 to maintain about 30% sag and still had 3-4mm of travel left. Close enough for me and the shock still felt great. I was able to lighten up the rebound to 6 clicks from closed w/o the spacer.

  101. #301
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    After a few more rides, I think a .2 spacer is needed. I know I don't need the .6 and bigger spacers that come in the kit and found Fanatic bike sells the .4 spacer individually for $5, so I ordered one and will trim it down a bit and keep the original .4 just in case.

  102. #302
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    I took a pair of snips and trimmed down a .4 spacer to ~ .25-.3 and got a ride in today. Psi set at 210. I figured I'd try open mode first and ended up leaving it there. Super plush on the small stuff and still supportive pedaling and on the bigger hits/drops. Still had 4-5mm of travel left. Think I'm done tinkering...for now.

  103. #303
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    Tag for reading later.


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  104. #304
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    New 17 9.9 frame on the stand and wondering if I should give the stock ReAktiv a go or not. The DPX2 seems like the way to go for more aggressive DH type riding, but I am mostly an XC rider with terrain we have here. A new 2020 rear shock does sound rad!
    17 Fuel EX 9.9 (in progress)
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  105. #305
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    Quote Originally Posted by NH Mtbiker View Post
    Subbed.
    New 17 9.9 frame on the stand and wondering if I should give the stock ReAktiv a go or not. The DPX2 seems like the way to go for more aggressive DH type riding, but I am mostly an XC rider with terrain we have here. A new 2020 rear shock does sound rad!
    I bought new dpx2 2020, bike feels great, so much better than the reaktiv. I rode trails in Finale Ligure and I wasn't happy with the bike. I wanted to sell it but I decided to upgrade the fork cartridge to fit4 2020 and changed damper to dpx2 2020. Love the bike and I'm gonna keep it.

  106. #306
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    Quote Originally Posted by NH Mtbiker View Post
    Subbed.
    New 17 9.9 frame on the stand and wondering if I should give the stock ReAktiv a go or not. The DPX2 seems like the way to go for more aggressive DH type riding, but I am mostly an XC rider with terrain we have here. A new 2020 rear shock does sound rad!
    Was not satisfied with ReAktiv on my 17 could never find the sweet spot. Went with a 19 dpx2 and never looked back. IMO set up properly really livens this frame no matter how you ride it.

    That being said, I now have 2020 Fuel Ex and wow what a difference in performance on new ReAktiv! Finally I believe they nailed it. I kept my dpx2 in case ReAktiv didn't live up to my expectations. Will install dpx2 at some point for a comparison on ride vs ReAktiv.

  107. #307
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    Quote Originally Posted by techfersure View Post
    That being said, I now have 2020 Fuel Ex and wow what a difference in performance on new ReAktiv! Finally I believe they nailed it. I kept my dpx2 in case ReAktiv didn't live up to my expectations. Will install dpx2 at some point for a comparison on ride vs ReAktiv.
    Agree 100%. Pleasantly surprised. Now it just has to pass the test of time.
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  108. #308
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    Quote Originally Posted by not2shabby View Post
    I took a pair of snips and trimmed down a .4 spacer to ~ .25-.3 and got a ride in today. Psi set at 210. I figured I'd try open mode first and ended up leaving it there. Super plush on the small stuff and still supportive pedaling and on the bigger hits/drops. Still had 4-5mm of travel left. Think I'm done tinkering...for now.
    @Not2Shabby Sorry for my delay, I've meant to reply for months...
    To answer your initial question as to why I'm on a FuelEX and not a Slash? I race XC occasionally so the FuelEX can work as double duty with some mods to the bike. I swap out my wheelset, often go back to the Reactiv shock for racing and sometimes swap out a few other parts. That said, I wish it had the head angle of the Slash.

    Regarding your setup... I still think you're riding that shock over damped. If you are at 210psi and 6 clicks from closed? You should be more like 8 clicks from closed (which is what the Fox chart says for that shock). 6 clicks from closed is for when you have closer to 240psi in the air can. Also, the spacer has no affect on the rebound. Only the air can pressure. ... I know you said you've ridden a lot of motorbikes... they tend to be much more over damped than a MTB would be. They have more travel to work from and generally run heavier damping anyhow. So if you're running your 130mm FuelEX to rebound like a motorbike, it's too slow for MTB performance. I can run my shock at 220 psi with zero rebound (full open) and it will kick off jumps and will feel a bit 'out of control' in fast stuff, but it doesn't prevent me from climbing up anything.

  109. #309
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    Quote Originally Posted by btjenki View Post
    @Not2Shabby Sorry for my delay, I've meant to reply for months...
    To answer your initial question as to why I'm on a FuelEX and not a Slash? I race XC occasionally so the FuelEX can work as double duty with some mods to the bike. I swap out my wheelset, often go back to the Reactiv shock for racing and sometimes swap out a few other parts. That said, I wish it had the head angle of the Slash.

    Regarding your setup... I still think you're riding that shock over damped. If you are at 210psi and 6 clicks from closed? You should be more like 8 clicks from closed (which is what the Fox chart says for that shock). 6 clicks from closed is for when you have closer to 240psi in the air can. Also, the spacer has no affect on the rebound. Only the air can pressure. ... I know you said you've ridden a lot of motorbikes... they tend to be much more over damped than a MTB would be. They have more travel to work from and generally run heavier damping anyhow. So if you're running your 130mm FuelEX to rebound like a motorbike, it's too slow for MTB performance. I can run my shock at 220 psi with zero rebound (full open) and it will kick off jumps and will feel a bit 'out of control' in fast stuff, but it doesn't prevent me from climbing up anything.
    personal preference is a big part of setup. the fox chart is nothing but a starting point. you can even see this with pros who have various setups. typically fast riders will be much stiffer than average riders. for example if i jump on richie rude's enduro bike i will think it's too stiff even though we are the same height and weight.

  110. #310
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    Quote Originally Posted by techfersure View Post
    To riding buddies went Dpx2 metric, both bike shop mechanics and totally approve of this shock with 140mm fork. I went with metric X2 and Fox 36 150mm on my 17 Fuel EX.
    I know it has been a while since this, but how did it end up going with the x55 X2? I'm thinking of getting one for my EX 9 with 140mm in the front.

  111. #311
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    The best shock for overall performance. I now have the 2020 9.9 frame and unfortunately the latest Re:Aktiv fell short again for more aggressive riding. Am installing another dpx2 but went back to 140mm fork.

  112. #312
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    Does anyone know if a DPX2 210x52.5 Yeti take off would work on a 2017 FEX 9?

  113. #313
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    As long as it's not a trunnion mount (requires different hardware) it should bolt right in. Whether or not the tune will be good is debatable. That can be changed though.

  114. #314
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    Quote Originally Posted by btjenki View Post
    @Not2Shabby Sorry for my delay, I've meant to reply for months...
    To answer your initial question as to why I'm on a FuelEX and not a Slash? I race XC occasionally so the FuelEX can work as double duty with some mods to the bike. I swap out my wheelset, often go back to the Reactiv shock for racing and sometimes swap out a few other parts. That said, I wish it had the head angle of the Slash.

    Regarding your setup... I still think you're riding that shock over damped. If you are at 210psi and 6 clicks from closed? You should be more like 8 clicks from closed (which is what the Fox chart says for that shock). 6 clicks from closed is for when you have closer to 240psi in the air can. Also, the spacer has no affect on the rebound. Only the air can pressure. ... I know you said you've ridden a lot of motorbikes... they tend to be much more over damped than a MTB would be. They have more travel to work from and generally run heavier damping anyhow. So if you're running your 130mm FuelEX to rebound like a motorbike, it's too slow for MTB performance. I can run my shock at 220 psi with zero rebound (full open) and it will kick off jumps and will feel a bit 'out of control' in fast stuff, but it doesn't prevent me from climbing up anything.
    A couple clicks off the Fox setup chart isn't a huge difference IMHO. Obviously we ride very different terrain and most likely have different rebound tunes also. I personally don't like having the seat smack my ass after hitting a big root or rock, so have the rebound set to prevent that. YMMV as they say.
    P.S. I've already admitted to being old and slow....

  115. #315
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    So this is the tune I found for the shock. I can't figure out what CDZ002 and RDZ002 mean. Any one? How about the Rzi AFM thing?

    2020, FLOAT DPX2, F-S, K, 3pos-Adj, Evol LV, Yeti, SB130, 210, 52.5, CDZ002, RDZ002, Rezi A F M, Neutral Logo

  116. #316
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    Here's a link to Fox's list of parts for the DPX2.
    https://www.ridefox.com/fox17/help.php?m=bike&id=970
    I don't see CDZ002 or RDZ002, but I'd guess they mean Compression Regressive and Rebound Regressive. I have no idea what the Z002 part means; but probably specifies the shim stack. I'm not sure how a regressive tune would work on a Fuel either. Both of mine are linear, I assume. You could swap out the shim stacks or send it to Fox though if you don't like it. The Ripmo tune my shock has works pretty dang good, I just have to run a few more clicks of rebound than they suggest.
    It looks like the Rezi code is for the base valve. They don't have much info on them.

  117. #317
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    For 200 bucks I think I'll take the Gamble and figure it out

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  118. #318
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    I just found in another thread what the Rezi codes mean. Mine is LFM.
    First letter is for the open mode, so L is light comp. A is adjustable on Factory series.
    Second letter is middle position, F would be firm.
    Third letter is lockout position, M for medium.
    Looks like yours would be Adjustable, Firm, Medium.
    You found a Factory or Performance series shock for $200?! That is a deal!

  119. #319
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    If you end up not liking the tune, you could send it to Avalanche or another reputable tuner and get it set up custom for your weight and riding style instead of guessing which stock Fox shim stacks would work for you.
    Right now I'm quite happy with the Ripmo tune, but down the road might opt for something else. It's soooooo much better the stock shock!

  120. #320
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    Just reread your post with the full description...F-S is factory series. You got the full Kashima treatment, Nice! Should have a bit less friction/stiction than the black anodized performance series. The black goes better with my Yarilanche though!
    There's even more info in this thread if you're interested.
    https://forums.mtbr.com/shocks-suspe...s-1075842.html

  121. #321
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    Ok, the shock will be here Friday. 2020 Factory DPX2. I've never swapped shocks before. Seems easy enough based on prior posts here. Just a few detail questions. Should I let the air out of the DPS prior to removing it? The new shock will come without the lower bushing. Can I reuse the bushing in my DPS? Should I grease anything or loctite anything when I put the new shock on?

  122. #322
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    I deflated the old shock and removed it. You'll have to get the black spacers off one side of the guide rods that go through the eyelets to move them to the DPX2. Be careful, there are tiny O-rings between them and the bushings in the eyelets. Reuse the bushings if they're not worn. I put a light coat of grease on the rods to make it easy to slide the spacers back on. Oh...loosen up the chainstay pivot bolt a little bit; it'll make getting the shock in and out a lot easier. I wrapped the plastic spacer in some inner tube and clamped it in a vise to twist it off. That sucker was tight! Don't crush it though.

  123. #323
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    So what am I missing? Do the spacers on the DPx2 (left) come off? I'm kinda stumped.

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  124. #324
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    Nevermind. Fixed. They do come off but needed some nice tools from my lbs

    Done! Now to dial it in. Hopefully the Yeti tune will play nice

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  125. #325
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    Yes. Pull the spacer off one side and a rod should be under it running through the eyelet and spacer on the other side. Push the rod out. You'll have to remove the spacers/rods from the stock shock and put them on the DPX2. Make sure you get them on the same way they are on the stocker. There's little o-rings between the black spacers and bushings you need to be careful and not lose. You might have to use a vise to clamp the spacers in to twist a bit to get loose. I used a piece of inner tube to wrap around the spacers to keep from damaging them


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  126. #326
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    Snap... didn't see your last post!

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  127. #327
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    Has anyone here considered another rear shock other than the DPX2 for their Fuel EX? I am also looking at the Topaz and the Manitou McLeod, both come in 210 x 55mm. The McLeod, with an added King Can is still under $300, seems like a solid choice imo.
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  128. #328
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    didn't someone here say that the topaz won't fit?

  129. #329
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    Quote Originally Posted by not2shabby View Post
    Snap... didn't see your last post!

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    Did you ever buy a stock shock? I know it's an old post but just wondering. I don't plan on keeping my dps

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  130. #330
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    I still have the stock shock, might sell it...might not. Can't decide, a backup could come in handy.

  131. #331
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    Quote Originally Posted by tabbibus View Post
    didn't someone here say that the topaz won't fit?
    Post #51, crae says a 210x55 topaz reservoir just marks the frame. I'm guessing a 210x52.5 wouldn't.

  132. #332
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    Quote Originally Posted by Hawgzilla View Post
    The (climb) position on the OEM shock is not a true lockout either. But it's plenty stiff enough for pavement riding which is where I set the shock when I ride to the dirt from home. Even true lock out shocks have a blow-off valve that activates on hard hits. I appreciate a little give because it's easier on my old, arthritic joints.

    Thanks for your input.
    Figured out why people are having different feelings about the 'lockout' position. Rezi codes will determine if you have Firm, Medium or Light damping.
    Rezi code FFF would be firm for all positions. First letter is open, second is trail and last is 'lockout' which we know isn't a true lockout. So if you have an M or L in the last letter of the Rezi code, it's going to feel softer than an F. I don't know what the stocker is.
    Factory series shocks with kashima coating will have an A for adjustable for the open mode.

  133. #333
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    Quote Originally Posted by not2shabby View Post
    Figured out why people are having different feelings about the 'lockout' position. Rezi codes will determine if you have Firm, Medium or Light damping.
    Rezi code FFF would be firm for all positions. First letter is open, second is trail and last is 'lockout' which we know isn't a true lockout. So if you have an M or L in the last letter of the Rezi code, it's going to feel softer than an F. I don't know what the stocker is.
    Factory series shocks with kashima coating will have an A for adjustable for the open mode.
    Yup. Mine is AFM. And honestly I don't think it's that firm. But I don't use it anyway. Open all the way for me. Love it

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  134. #334
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    Alright guys, I've been following this thread for a year, I'm still a little confused, this is my first post. I have a 2018 Trek Fuel ex8 29. If I buy the 2019 Dpx2 210x55 from probike and get the optional top and bottom hardware for my model, will I be able to just change the shock out, or have to mess with eyelets and things like that? Little nervous about doing the custom mods required on some of the models.

  135. #335
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    Quote Originally Posted by GregD351 View Post
    Alright guys, I've been following this thread for a year, I'm still a little confused, this is my first post. I have a 2018 Trek Fuel ex8 29. If I buy the 2019 Dpx2 210x55 from probike and get the optional top and bottom hardware for my model, will I be able to just change the shock out, or have to mess with eyelets and things like that? Little nervous about doing the custom mods required on some of the models.
    If you order the DPX2 off Probikesupply with the mounting hardware, you'll just have to install the hardware to the shock (unless they already install it) and install into the frame using the factory bolts that are securing your current shock. It's super easy to install, but shoot me questions if you get any. If you don't have a Nm torque wrench, I would suggest finding one to properly torque all the hardware to their listed specs as well.
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  136. #336
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    Oh wow that is so cool! It's going to be a little while but I will report back, thank you!

  137. #337
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    Quote Originally Posted by crae View Post
    Itís funny how the fox DPX2 fits at 210x55. I bought a DVO topaz at the same spec and it didnít clear the frame. I had to put a spacer in it. I have a 19.5 frame. I know there a people that have installed the topaz with this spec and it seems to clear frame. My bike is special..
    I too am looking at the Topaz for my 17 FEX 9.9. It has the dimple on the down tube and hoping it works out. I did see on the DVO website that they have the shock in 210 x 52.5, so that size should fit my 18.5....still waiting to hear back from DVO to confirm. How has your modified Topaz been working out?
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  138. #338
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    Anyone know if the DPX2 will work on a 2015 Fuel EX 8?

  139. #339
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    Post #214, he put one on a '16' and had issues. I'd ask Fox if they have one to fit your model year.

  140. #340
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    Quote Originally Posted by phillipsrog View Post
    Just wanted to thank you guys for the intel about the DPX2. I installed one and it's made the difference between selling the bike and keeping the bike.

    A little background, I sold my Santa Cruz Bronson and bought a 2018 Fuel EX 9.8. I liked the Fuel, especially how it climbed and how it fit, but never felt it was as plush and responsive as the Bronson on downhills. I chocked that up to going from 150mm VPP suspension and 27.5 to 29, single pivot and 130mm. Everything has its tradeoffs.

    I couldn't put my finger on what I disliked about how the Trek rode downhill, but it just seemed kind of chunky and sloppy handling at speed. I also bought into the hype about the Penske Racing tuned shock and thought it was proprietary and couldn't be replaced.

    Anyway, read this thread and learned others were having similar issues, and after installing the DPX2 and playing with PSI and other adjustments, the bike immediately rode better. I wasn't ready to conclude that it wasn't a case of new-toy euphoria/placebo effect. I rode yesterday on a 14-mile ride and posted 19 Strava PRs including 9 fastest times.

    It corners better, pumps better (maintaining speed in the whoops) and just handles better. It's faster, but more importantly, more fun to ride.

    Not trying to sell anyone anything, but if they're on the fence, that's my take, and wanted to share because others providing their experience likely prevented me from selling my bike. While that shock isn't cheap by any stretch, it's cheaper than replacing the bike.
    Thanks for sharing your experience. I am thinking of doing that exact same upgrade. I am riding the 2017 EX5 which comes with a RockShox Deluxe RL (without RE:aktiv). The wallowing on technical climbs where standing up is necessary bothers me and I was hoping the DPX2 could be a remedy due to the low-speed compession adjustment which I hear can help to reduce pedal bob. What is your experience with pedal bob on technical (standing up) climbs?

  141. #341
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    Lots of good info in this thread. So much so that it's a bit confusing.

    My frame is an alloy 2018 EX 29er.

    Regarding the use of the 210X55 shock DPX2: The slight increase in travel will not cause contact of parts if the shock bottoms out?

    The mounting hardware on the OEM Reaktiv shock can be directly transferred over to the DPX2 shock?

    Thanks in advance.

  142. #342
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    ^^^ Not sure on the 55 mm stroke, though IIRC, a few did this without trouble. I went with the standard 52.5.

    I believe your aluminum frame has a shock with "through-bolts" top and bottom? If so, your mounting hardware should transfer directly. If not, you have to do some finagling.
    Whining is not a strategy.

  143. #343
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    Quote Originally Posted by Hawgzilla View Post
    Lots of good info in this thread. So much so that it's a bit confusing.

    My frame is an alloy 2018 EX 29er.

    Regarding the use of the 210X55 shock DPX2: The slight increase in travel will not cause contact of parts if the shock bottoms out?

    The mounting hardware on the OEM Reaktiv shock can be directly transferred over to the DPX2 shock?

    Thanks in advance.
    Absolutely no bottom out!

  144. #344
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    And yes, you just use the same hardware to bolt in the DPX2. You'll have to get the spacers off one side of the old shock to get the tube the bolts go through off. Mine were really tight, I had to wrap it in a bit of inner tube and clamp it lightly in a vise and twist it off. Be careful, there are tiny o-rings you don't want to lose.

  145. #345
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    Well, that was a pain in the ass 😅! Five trek dealers and two other shops were unable to provide or find the hardware for the DPX2 swap on my '18 9.9. As others have done, had to go to the hardware store and source my own parts, then modify them to fit. End results seem promising do far. Ended up with the DQM4 55mm stroke with the 1.02 spacer. I'm @175lbs kitted up, fast aggressive rider; running 218psi 6 clicks LSC, 6 clicks rebound, and prefer the medium compression for pedaling sections. Will go for a few proper rides here in the coming weeks for a better review.

  146. #346
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    Quote Originally Posted by propht View Post
    Well, that was a pain in the ass 😅! Five trek dealers and two other shops were unable to provide or find the hardware for the DPX2 swap on my '18 9.9. As others have done, had to go to the hardware store and source my own parts, then modify them to fit. End results seem promising do far. Ended up with the DQM4 55mm stroke with the 1.02 spacer. I'm @175lbs kitted up, fast aggressive rider; running 218psi 6 clicks LSC, 6 clicks rebound, and prefer the medium compression for pedaling sections. Will go for a few proper rides here in the coming weeks for a better review.
    Thats BS, my local Trek dealer had all hardware in stock two seasons ago for my 18. I installed dpx2 on my 2020 couple of weeks ago, had shock bolts in stock but no spacers or sleeves available, so mechanic machined spacers and sleeves. Yes, they have a machine shop too and have done other projects for me!!

  147. #347
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    That's awesome! No such luck here. Had to file the bushings and spacers down myself. The 10mm hardware was the problem apparently 🤷🏼*♂️🤦🏼*♂️🤬

  148. #348
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    Hello fellas! Can anyone help me find the adapter/ Mount kit for my bike? I bought the 2020 dpx2 210x52.5 already and I have a2017 fuel ex 9.7. thanks for any help!

  149. #349
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    Quote Originally Posted by bobpeezy View Post
    Hello fellas! Can anyone help me find the adapter/ Mount kit for my bike? I bought the 2020 dpx2 210x52.5 already and I have a2017 fuel ex 9.7. thanks for any help!
    Your Trek dealer should be able to order or have in stock.

  150. #350
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    Just picked up a new DPX2 Performance model (Ibis Ripmo) from Fanatikbike.com. Still on the fence if I should sell the original Reaktiv still on the bike - it's new and may want to keep as a backup if this does not work out. I could also swap the 2 or sell both and upgrade to a Factory DPX2. Question for those who have the black Performance: Is this shock enough without the added LSC settings? Thnx!
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  151. #351
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    Quote Originally Posted by NH Mtbiker View Post
    Just picked up a new DPX2 Performance model (Ibis Ripmo) from Fanatikbike.com. Still on the fence if I should sell the original Reaktiv still on the bike - it's new and may want to keep as a backup if this does not work out. I could also swap the 2 or sell both and upgrade to a Factory DPX2. Question for those who have the black Performance: Is this shock enough without the added LSC settings? Thnx!
    Go for the Factory dpx2, you won't be sorry! Might as well keep stock shock, not worth much
    , keep for backup.

  152. #352
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    Quote Originally Posted by techfersure View Post
    Go for the Factory dpx2, you won't be sorry! Might as well keep stock shock, not worth much
    , keep for backup.
    Yeah, I think I will sell both and go for either a 20 or 2021 Factory DPX2...
    the 210 x 55.
    I'll be pairing it up with a 140mm Factory FIT4 fork, so the new 9.9 from 17 should be a great bike built up...can't wait!
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  153. #353
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    Quote Originally Posted by NH Mtbiker View Post
    Yeah, I think I will sell both and go for either a 20 or 2021 Factory DPX2...
    the 210 x 55.
    I'll be pairing it up with a 140mm Factory FIT4 fork, so the new 9.9 from 17 should be a great bike built up...can't wait!
    I have the 2020 9.9 frame I built up, I do like the slacker geometry and a tad longer reach then my previous 17 9.9. I have Fox Factory 36 at 150mm with Push acs3, nothing like coil and of course Factory dpx2! Perfect trail bike with the ability to hit the knar!!!

  154. #354
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    Quote Originally Posted by techfersure View Post
    I have the 2020 9.9 frame I built up, I do like the slacker geometry and a tad longer reach then my previous 17 9.9. I have Fox Factory 36 at 150mm with Push acs3, nothing like coil and of course Factory dpx2! Perfect trail bike with the ability to hit the knar!!!
    Funny thing is, that I've been reading up on the Ripmo posts and most say the the black DPX2 is just fine and actually makes less clunky noises than the Factory version. Think I will run it and see how it goes. Also, the stock 9.9 Reaktiv is actually a fairly decent shock, just not as progressive and coil-like as the DPX2. Both shocks for different terrain should serve me well...will report back in a month or two after the build is complete!
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  155. #355
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    Little update on the DPX2 with DQM4 tune on my '18 9.9. It's a great shock. It's not the perfect tune for this bike, but I'm super picky. That said, I'm really digging how the bike is riding! Rough high speed sections that the stock shock would feel overwhelmed on feel like butter!!! Problem is that the rear can now out ride the Fox 34 140mm. So, now the search is on for a 36 factory 150mm with a 44 offset to keep the geo happy.
    I've been really impressed with this bike in light weight marathon mode ( Kovee XXX wheels, 130mm fork, high setting, XR3s 2.4 front and 2.2rear, xc Cushcore in the rear). Also, in party mode (140mm fork, big rotors, low setting, line 30s XR4s 2.6F and 2.4R with Cushcore rear. It's not a Top fuel though and it so much more capable than it's stock form will allow... So, I'm turning it into it's fully capable form. 210x55 rear 36 150mm up front, big rotors, XR5 2.6 up front SE4 2.4 with xc Cushcore rear on the line 30s.
    I'll report back once I get a fork and have a few rides on it.

  156. #356
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    Quote Originally Posted by jbaileyhayden View Post
    I bought a New Take Off DPX2 that came off an Ibis Ripmo from FanaticBike.com, which has almost exactly the same shock size: 210x55. I believe there are a couple other post that says this shock size fits fine. Had to do a few modifications to transfer over the mounting hardware, but the shock installed and clears the frame fine. Been riding on it for a couple weeks now and it's been great. I know it's been tuned for a Ripmo, but at $300, I'd give it a shot.

    Looks like they have 2 more in-stock:
    https://www.fanatikbike.com/products...x55mm-oem-2019

    Attachment 1212047

    Thank you so much for your idea. I just got DPX2 ibis take off from fanaticbike.com for $190. Can't be the price since I didn't see any decent used rear shocks for less than $300. Its feels so much better than the stock shock on my 2018 Trek Fuel Ex 9.8. I used a rock shox bushing removal tool to remove the du bushings.

    https://www.amazon.com/RockShox-2-In...80965258&psc=1

    Thanks for sharing everyone.

  157. #357
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  158. #358
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    Well it was an extremely easy install for me. I guess the previous owner got all new bushings and what not.


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  159. #359
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    Tuning update! The bike has been killing it around Moab! Mainly in the mountains since it's so hot in the valley. After running the 1.02 spacer, I went down to the .86 and increased the air pressure. It's been working out well, but in still regularly leaving 1-2mm of travel on fast burly rides. The pedaling feels good, but I'm going to step down again to the .6 spacer and see if I can get full travel while still pedaling well. Will report back in a few weeks.

  160. #360
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    @propht
    Regarding running the 1.02 in a 210x55 DPX2 that is way out of spec for that shock. Luckily you're not heavy (and therefore run relatively low pressure at 218psi), but if you were you run the risk of exploding the shock with a spacer like that. See this chart: https://www.ridefox.com/fox17/help.php?m=bike&id=568 The .6 is the largest volume spacer Fox 'recommends' in the 210x55 DPX2.

    Regarding volume spacers, I know a few aggressive riders who run DPX2s on their Trek Fuels and no one is using more than a .6 anyhow. .8 causes so much ramp that if you're running 30% sag you will nearly never reach full travel unless hucking to flat, etc.

    If you are 175lbs, running 218psi and a .8 Spacer you have very little mid-stroke and are likely wallowing in travel too much. Over sagged. Must be at ~35% sag at least, if not more with that pressure. I weight 148lbs (155 kitted up) and run nearly the exact same pressure (~218) for ~25-27% sag.

    Would suggest running the .6 volume spacer and upping your pressure to a more appropriate level for your weight (if you are riding agressive) 240+. You'll have more mid-stroke support and the bike will feel way more alive. You'll obviously need to add at least 1 more click of rebound damping, if not two if you just from 218>240.

    Right now you're setup to prevent bottoming from the use of an overly large volume spacer. It's better to have the right air pressure in there and then add in spacers as needed. For instance, start at a .4 spacer, set your sag at ~27%. Ride it hard, if you bottom it, put in the .6. If you're still bottoming it out a ton @ 27% sag, then go with the .8 if you really have to. But you won't if you're running correct pressures for your weight.

  161. #361
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    I just finished my first ride and so far so good. I set it up for 14mm of sag and it looks like Iím getting pretty close to full travel and I didnít ride the gnarliest stuff I sometimes ride. Maybe I should try a small spacer? I did get a package of them with the shock.

    IIRC I only had to run about 200psi to get 14mm of sag and Iím probably about 185lbs fully geared up.

    Iím noticing a smoother ride but what Iím noticing the most is better braking. The rear wheel skipping I was getting from the rear tire is gone. Braking is much more predictable.


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  162. #362
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    Thank you. With the .8 I was running 235psi and still had 1-2mm of travel left. Going back down to the .6 tomorrow. When setting the shock up I tried the .4 on up. Settled on the bigger spacers based on what I was looking for in ride feel. Going back after some trial and setup findings. I do run the bike hard. Have been running the whole Enchilada and portal in Moab a lot this summer.

  163. #363
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    Man this shock does feel a lot better. I just smashed a couple PRs on some downhillish trails that I typically ride. I also flipped my chip to the low setting and basically set sag to 20% on the Reba and 14ish mm on the rear. No BB strikes and I feel much better in turns and on the downhills.

    Now I just need a Bomber z2 and I am done until stuff starts breaking.
    Last edited by Sickmak90; 07-28-2020 at 09:57 AM.

  164. #364
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    Quote Originally Posted by Sickmak90 View Post



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    Did you buy this used off ebay? If so now I know who kept outbidding me

  165. #365
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    No but I sold it lol.

    I really liked it but I need a few bucks (thanks Covid).


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  166. #366
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    Hi, guys. Iíve dpx2 2020 FEX version for over a year, it is a great shock, better than the default one but there is one problem. 2020 dpx2 is more active on fireroads, it gives me more noticeable pedal bob even when itís in closed position. Played with higher pressures but it is still there. Maybe the problem is full floater design? In 2020 trek introduced the new FEX without it so maybe the 2020 dpx2 is valved especially for the new FEX? How about yours guys? I read some review that tells that the more pedal bob is the only sacrifice.

  167. #367
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    Quote Originally Posted by norbertm View Post
    Hi, guys. Iíve dpx2 2020 FEX version for over a year, it is a great shock, better than the default one but there is one problem. 2020 dpx2 is more active on fireroads, it gives me more noticeable pedal bob even when itís in closed position. Played with higher pressures but it is still there. Maybe the problem is full floater design? In 2020 trek introduced the new FEX without it so maybe the 2020 dpx2 is valved especially for the new FEX? How about yours guys? I read some review that tells that the more pedal bob is the only sacrifice.
    I would agree. On my 2020 FEX, the DPX2 bobs a little bit more than the stock Reaktiv did -- but the Reaktiv is a superb pedaling shock. Tradeoff is that the DPX2 is plusher.

    I'm happiest with the DPX2 in open on long descents, and the middle position everywhere else.
    Whining is not a strategy.

  168. #368
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    Quote Originally Posted by kosmo View Post
    I would agree. On my 2020 FEX, the DPX2 bobs a little bit more than the stock Reaktiv did -- but the Reaktiv is a superb pedaling shock. Tradeoff is that the DPX2 is plusher.

    I'm happiest with the DPX2 in open on long descents, and the middle position everywhere else.
    Yes sir, thatís exactly my observations with my 2017 FEX and dpx2. I love it with the dpx2.
    All good then, thanks for sharing your experience!

  169. #369
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    Quote Originally Posted by norbertm View Post
    Hi, guys. Iíve dpx2 2020 FEX version for over a year, it is a great shock, better than the default one but there is one problem. 2020 dpx2 is more active on fireroads, it gives me more noticeable pedal bob even when itís in closed position. Played with higher pressures but it is still there. Maybe the problem is full floater design? In 2020 trek introduced the new FEX without it so maybe the 2020 dpx2 is valved especially for the new FEX? How about yours guys? I read some review that tells that the more pedal bob is the only sacrifice.
    Yes, this is exactly what I experienced as well. The Reactiv does an amazing job in the pedaling department (even when full open). But this thread is a testament to people not liking the 'feel' of the shock in other parts of the rides. The Trek suspension platform does not have a lot of anti-squat and is not very efficient when compared to a lot of other bikes. This is designed in as it gives better suspension performance when climbing and pedaling over rough terrain. Trek's philosophy is to let the Reactiv/damping in the shocks create a better pedal platform, rather than using mechanical anti-squat. The result however, when you change the shock to a standard shock is it that it's pretty soft and bouncy when pedaling.

    The new Slash is shipping without Reactiv and I believe that Trek has increased mechanical anti-squat on this bike so that the bike still pedals well without relying on the shock damping to do it.

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