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  1. #551
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    ^ Mark, if you could confirm or deny the crank clearance dimension shown in the diagram here: SUGINO it would be very helpful. Are the crankarms really 17mm thick at the pedal eye as implied?!?

  2. #552
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    Quote Originally Posted by satanas View Post
    ^ Mark, if you could confirm or deny the crank clearance dimension shown in the diagram here: SUGINO it would be very helpful. Are the crankarms really 17mm thick at the pedal eye as implied?!?
    Sure, I can do that. It may take me a few days, though, as I haven't installed them (yet).
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  3. #553
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    Quote Originally Posted by satanas View Post
    ^ Mark, if you could confirm or deny the crank clearance dimension shown in the diagram here: SUGINO it would be very helpful. Are the crankarms really 17mm thick at the pedal eye as implied?!?
    Just checked, and they are 17mm at the pedal eye.
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  4. #554
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    Yikes - I thought it had to be a misprint. Most other cranks (including XX) are much thinner, so I'll need to be careful when I go frame hunting...

  5. #555
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    Hi

    I given this thread a speed read over last couple of hours and still no better off on finding out how to do what I want so thought I would just as well ask so sorry if its old news to you all but then it should be a simple one for ya.

    I have a FUBAR'ed knee and can no longer push the big gears on my road hybrid. I need to continue cycling to keep my mobility and ROM so I would like to move to a 36t rear cassette.

    My current set ups is full 10 speed Ultegra 6700 with flat bar shifters, this includes 6700 compact 50/34 chainset, front/rear durailleur and 12-30t 10 speed cassette.

    I want to stay 10 speed and keep the 6700 chainset and flat bar shifters but change the cassette to a 10 speed 11-36t XT or XTR one with a MTB rear derailleur (preferably shadow plus mech). So my question is what parts do I need to achieve my setup and it all shift buttery smooth? I take it I am looking at a new rear derailleur and the correct chain..speaking of chains my normal preference is KMC.

    Thanks for any advice and sorry for the repeat post if heard before.

    Cheers

  6. #556
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    I read a lot of this thread, but am still confused about something; bike is used for both city, XC and moderate descents, change tires depending on what type of riding I'll be doing. I like the bigger outer ring for really flying through the city with the suspension stiffened up...

    Will the FC-M590-10 26/36/48 9-spd/10-spd* crankset and FD-M590(10-spd) be compatible with a SLX 10-spd cassette and XT RD-M786+?

    *Thing is, several stores have the FC-M590-10 stated as 9-spd compatible, but also state that the "42t and the 48t outer ring models are 10 spd"; any truth to this?
    I drive more when the streets need repairs! -'95 ZJ

  7. #557
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    Quote Originally Posted by pdxmark View Post
    I read a lot of this thread, but am still confused about something; bike is used for both city, XC and moderate descents, change tires depending on what type of riding I'll be doing. I like the bigger outer ring for really flying through the city with the suspension stiffened up...

    Will the FC-M590-10 26/36/48 9-spd/10-spd* crankset and FD-M590(10-spd) be compatible with a SLX 10-spd cassette and XT RD-M786+?

    *Thing is, several stores have the FC-M590-10 stated as 9-spd compatible, but also state that the "42t and the 48t outer ring models are 10 spd"; any truth to this?
    Hi, a ten speed chain will work on 9 speed front, but what u need to do is make sure u don't go too big cassette wise. the sgs has a 43t chainwrap capacity so 26/36/48 =22t and a 32/11=21 total 43t. going any bigger on the cassette would destroy the RD.
    keep all 9 speed front and all 10speed rear and should be sweet.

  8. #558
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    Quote Originally Posted by blingman View Post
    26/36/48 =22t and a 32/11=21 total 43t.
    I have a SLX 34/11 cassette. I'll go with the 44t large ring. Thanks for the help!
    I drive more when the streets need repairs! -'95 ZJ

  9. #559
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    Quote Originally Posted by Nasty1 View Post
    I want to stay 10 speed and keep the 6700 chainset and flat bar shifters but change the cassette to a 10 speed 11-36t XT or XTR one with a MTB rear derailleur (preferably shadow plus mech). So my question is what parts do I need to achieve my setup and it all shift buttery smooth? I take it I am looking at a new rear derailleur and the correct chain..speaking of chains my normal preference is KMC.
    What you need is a 9 speed MTB rear derailleur. 10 speed MTB (including all DynaSys/Shadow+) will not work with road 10 speed shifters as the cable travel is different.

    However, if you switch the rear shifter to DynaSys (check what's on special, i.e., Deore, SLX, Zee, etc) then you can use Shadow+; since you've got 50x34 rings at the front, a long cage RD is probably safer, but medium cage *might* work; short cage is out.

  10. #560
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    Can anyone help? going back to biking and recently got hold of a 2013 Reign FR frame. Just realized that it requires a direct mount FD... I have an all-XT 9speed drivetrain from my old bike but the FD is not direct mount. I have a 3-ring crank, which i converted to a 2-ring setup by replacing the big ring with a bashguard.

    My question is, if I want to keep my 9speed setup and minimize cost what direct mount FD should i get? Can i get away with a 10speed FD? If yes, should I get one for a 3-ring setup?

    Thank you very much!

  11. #561
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    I've also got a full XT 9 speed drive train with bash guard and I'm using a XT M786 10 speed front derailleur. It works perfectly well but takes a bit of adjusting. You could also use an XT 9 speed, three ring direct mount and limit it's travel with the high limit screw. I chose to use the 10 speed derailleur because it afforded me more tire clearance. It has a shorter/smaller cage.

    Dyna Sys 10 speed compatability with 9 speed (Shimano systems)-img_1580.jpg
    The trouble with having an open mind is that people will insist on trying to put things in it.

  12. #562
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    Quote Originally Posted by DarKmaN View Post
    Can anyone help? going back to biking and recently got hold of a 2013 Reign FR frame. Just realized that it requires a direct mount FD... I have an all-XT 9speed drivetrain from my old bike but the FD is not direct mount. I have a 3-ring crank, which i converted to a 2-ring setup by replacing the big ring with a bashguard.

    My question is, if I want to keep my 9speed setup and minimize cost what direct mount FD should i get? Can i get away with a 10speed FD? If yes, should I get one for a 3-ring setup?

    Thank you very much!
    If you're using the granny and middle rings, you'll need a derailleur for a triple.
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  13. #563
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    Quote Originally Posted by MileHighMark View Post
    If you're using the granny and middle rings, you'll need a derailleur for a triple.
    No you don't.

    Dyna Sys 10 speed compatability with 9 speed (Shimano systems)-img_1580.jpg
    The trouble with having an open mind is that people will insist on trying to put things in it.

  14. #564
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    Quote Originally Posted by Ronnie View Post
    No you don't.

    Click image for larger version. 

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    Yes and no. See:
    http://www.raceface.com/comp/pdf/10%20Speed%20FAQ.pdf

    The OP can use a double, but not a 2x10 derailleur.
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  15. #565
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    Quote Originally Posted by Ronnie View Post
    I've also got a full XT 9 speed drive train with bash guard and I'm using a XT M786 10 speed front derailleur. It works perfectly well but takes a bit of adjusting. You could also use an XT 9 speed, three ring direct mount and limit it's travel with the high limit screw. I chose to use the 10 speed derailleur because it afforded me more tire clearance. It has a shorter/smaller cage.

    Click image for larger version. 

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    thanks! finding a 9speed RD is proving difficult where i am from... Okay, so a 10speed FD is fine and i don't need shift to a 10speed chain to make it work and last. thanks again!

  16. #566
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    Quote Originally Posted by MileHighMark View Post
    Yes and no. See:
    http://www.raceface.com/comp/pdf/10%20Speed%20FAQ.pdf

    The OP can use a double, but not a 2x10 derailleur.
    Yes you can. That is exactly what I've been using for some time now.

    Dyna Sys 10 speed compatability with 9 speed (Shimano systems)-img_1580.jpg
    The trouble with having an open mind is that people will insist on trying to put things in it.

  17. #567
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    Edit: Thanks for the help guys.
    Last edited by pdxmark; 09-17-2013 at 01:02 AM.
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  18. #568
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    Read through the thread and my question didn't seem to be answered directly. Pretty simple...

    Will a dyna sys XT 10 spd chain work fine with a normal M532 Deore crank? If I've read correctly, the dyna sys chain is mainly for the rear cassette. Will I have any problems here? I'm swapping out my rear end with a 10spd XT cassette, XT Shadow plus RD, and a XT chain (all dyna sys). My question is if the front crankset will work fine. The front crankset is not dyna sys.

    Thanks in advance!

  19. #569
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    Will a dyna sys XT 10 spd chain work fine with a normal M532 Deore crank? If I've read correctly, the dyna sys chain is mainly for the rear cassette. Will I have any problems here? I'm swapping out my rear end with a 10spd XT cassette, XT Shadow plus RD, and a XT chain (all dyna sys). My question is if the front crankset will work fine. The front crankset is not dyna sys.

    "yip, it will work perfectly, until u just go "f... it" and change the front like i did, LOL

  20. #570
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    I've been running a 10sp chain on an old (early '80s vintage) triple crank for about 9 months now and it works fine. In fact it works better than the old 6/7/8 sp. chain I have on there before in that it does not rub when cross chained like the wider chain did. Also less trimming of the FD.

  21. #571
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    Quote Originally Posted by 4Crawler View Post
    I've been running a 10sp chain on an old (early '80s vintage) triple crank for about 9 months now and it works fine. In fact it works better than the old 6/7/8 sp. chain I have on there before in that it does not rub when cross chained like the wider chain did. Also less trimming of the FD.

    Cool, that's good to know. I think I was more concerned with the Dynasys part of the 10 speed chain. I'll have all Dynasys components in the rear but the front crank is not. Wasn't sure if the Dynasys chain was specific to dynasys components.

  22. #572
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    Quote Originally Posted by Poopshute View Post
    Cool, that's good to know. I think I was more concerned with the Dynasys part of the 10 speed chain. I'll have all Dynasys components in the rear but the front crank is not. Wasn't sure if the Dynasys chain was specific to dynasys components.
    Not sure if there are special shapes in that chain to match with ramps and pins on the DynaSys cogs/chain rings or not. The cranks I am using are old enough that they pre-date any of that shaped tooth stuff, so they are just smooth chain rings. I am also running 10sp chain and rear cassette with 9sp. front cranks on my cross bike and that also works great. Best shifting bike I have ridden (with 10sp-road bar end shifters).

  23. #573
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    X Post Bump!

    If anyone has some pointers on this I'd appreciate it:

    Bump! SRAM 9spd shifting Shimano 10spd help

    Thanks in advance-JMac
    Wait whuuut, who did he tell you that!?!?....

  24. #574
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    Just wanted to post up that the rear dynasys components and dynasys chain work fine with a M525 Deore crank and 9-speed chainrings. No issues even while still utilizing the front 3-speed (10 speed ) derailleur.

    Quote Originally Posted by Poopshute View Post
    Read through the thread and my question didn't seem to be answered directly. Pretty simple...

    Will a dyna sys XT 10 spd chain work fine with a normal M532 Deore crank? If I've read correctly, the dyna sys chain is mainly for the rear cassette. Will I have any problems here? I'm swapping out my rear end with a 10spd XT cassette, XT Shadow plus RD, and a XT chain (all dyna sys). My question is if the front crankset will work fine. The front crankset is not dyna sys.

    Thanks in advance!

  25. #575
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    Not sure where to ask this; can SRAM and Shimano front shifter and derailleurs be mixed. I have an X4 shifter and need FD to work with it on 8spd; so I was wondering if the SRAM X4 left shifter would work with the Shimano Altus M310 FD?

    Thanks in advance, hope it's okay to ask this here. If not, please direct me to the proper thread?
    I drive more when the streets need repairs! -'95 ZJ

  26. #576
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    FYI, I now have more of the previously mentioned adapter blocks available, allowing the use of a 9 speed Sram shifter and a 10 speed Shimano clutch derailer. If interested, shoot me an email at rob[dot]stead[at]gmail[dot]com
    9-10 speed derailleur adapters: http://tinyurl.com/odnm2fn

  27. #577
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    This is rather large thread, but I couldn't see if anyone is running this setup:

    Shimano Zee 10sp Rear Mech
    SRAM x5 8 Speed shifter (1:1 actuation ratio)
    8 sp chain and cassette

    Would this work? Would the chain be too thick? I'm running a single ring up front, hence the Zee RD.

    Would the 6mm spacer help with an 8sp setup or would I have to use trial and error.

    Thanks

  28. #578
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    Quote Originally Posted by GRAVELBIKE View Post
    Yes and no. See:
    http://www.raceface.com/comp/pdf/10%20Speed%20FAQ.pdf

    The OP can use a double, but not a 2x10 derailleur.
    You can. It works. Its not meant to but it can be setup without issues.

  29. #579
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    Quote Originally Posted by HypnoT0AD View Post
    This is rather large thread, but I couldn't see if anyone is running this setup:

    Shimano Zee 10sp Rear Mech
    SRAM x5 8 Speed shifter (1:1 actuation ratio)
    8 sp chain and cassette

    Would this work? Would the chain be too thick? I'm running a single ring up front, hence the Zee RD.

    Would the 6mm spacer help with an 8sp setup or would I have to use trial and error.

    Thanks
    No. 9 speed sram (not 1:10) can be made to work with 10 speed shimano, but 1:1 is very different from shimano's pull ratios. Go ahead and convert to 9 speed, and use the zee derailluer with a spacer.

  30. #580
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    I just want to know if I can use my xt rd with a shimano 10 speed rear shifter

  31. #581
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    Re: Dyna Sys 10 speed compatability with 9 speed (Shimano systems)

    Quote Originally Posted by applehead110 View Post
    I just want to know if I can use my xt rd with a shimano 10 speed rear shifter
    No.

    Sent from my EVO using Tapatalk

  32. #582
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    First post here on MTBR, but a long time BF'er.

    I've made the mistake of buying 10sp parts (Shifter, Cassette, chain) as a quick and cheap upgrade to my commuter bike. Now, after reading about Dyna Sys and all the incompatibility with everything else ever made, I regret this decision.

    My bike is an old Trek 7000, with 7sp LX on it, and the drivetrain is pretty worn out. I really started by putting a dynamo wheel in the front, and then also rebuilding my rear to match, so this looks and rides good. I wanted to upgrade the brakes, the old cantis needed pads and cables, never worked well. The thought was v-brakes as I've always liked the way they stop. Discs were out of the question. One change leads to another and that's where I ended up with 10 speed. I didn't realize how different it was.

    Before I just decide to scrap the 10sp parts by putting them up on eBay, would I be able to use just the 10sp shifter, cassette, derailleur, KMC 10sp chain, and still have it work with the old 7sp crank and front der? Or is this just too much of a kluge? It doesn't have to be perfect. And is 10sp just overkill anyway? This stuff looks like it was made for the trails and is totally unnecessary for the streets.

  33. #583
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    I have read the vast majority of this thread and either haven't found a set up the same as mine, or anyone who does never followed up with results. I want to use 2x10 cranks as a 2x9.

    I just bought a new 2x10 Shimano XT crank with 26-38t chainrings. Will I run into problems with my entirely 9 speed drive train? Here's the set up:

    -2x10 XT crank with DynaSys rings
    -x.9 shifters
    -Shimano Alivio front mech.
    -x.7 rear mech
    -SRAM P971 chain with Powelink <-----needs replacing anyway (too short)!
    -SRAM 11-32t cassette

    Appreciate any assistance!

  34. #584
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    Maybe.

    If you have 3x9 shifters, your FD may work with the crank but you'll use 2nd and 3rd shifter positions. I have my doubts about this setup, you'll be far better off with a 2X FD and shifter.
    You'll need a ten speed chain. The rear shifter, der, and cassette will be fine.

  35. #585
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    Thanks for the reply. I am using 2x9 shifters. So my options are:

    Cheap: buy a 3x9 X.9 shifter and 10sp. chain
    Expensive: buy a 2x10 shifter, 10 sp. FD, and 10sp. chain

    If I go the expensive route, does it matter if I go with SRAM or Shimano for the derailleur? I prefer the lever layout of SRAM to the index finger trigger of Shimano

  36. #586
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    Im not familiar with specific 2x9 shifters. To my knowledge all 2x9's are triples that use only the middle and granny rings. Front shifter, crank and front derailliur are still 3X.
    There are some specific FD's like Shimano 665/667's made for 36/22 cranks, and some cranks that came with 2 rings, but they are 3X designs modified for 2 rings. These are Doubles, not 2X systems.

    You have a 2X crank, and I'm pretty sure a 3X front der, and a 3X front shifter. As a general rule, keep double fronts with double shifter/ ders and 2X fronts with 2X shifters/ ders.

    If I'm correct about your parts the cheap way out is sell the new XT crank and buy a 3X. If you think I'm mistaken about your shifter and FD, post some part #'s for me to check out.

    FYI, Shimano has had thumb release for quite some time now.

  37. #587
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    Hello MTBR,

    I wanted to share that I just setup a medium cage M785 with my 39-tooth 8-speed Action-Tec USA heat-treated titanium cassette and XT v-brake/rapid fire M739 combo shifter. I had found this thread before making the decision to replace my old XT M739 derailleur and knew I'd just need to shorten the swing arm to work with my setup.

    All that was needed was to make a cable adapter that moves the cable's attachment point closer to the pivot of the derailleur's swing arm. The piece of aluminum I made this from measures about 12mm wide X about 28mm long and was cut from some scrap 1/8" thick piece I had laying around:



    The bend matches the angle of the original swing arm and moves the cable attachment point approximately 7mm closer to the pivot. It is difficult to measure but I think the original swing arm length is 30mm and shortening it to about 23mm is the sweet spot for my old & trusty XT M739 shifter:



    Here is a top view showing the bend of the piece I made. The chain is a SRAM PC991:



    Making this piece was very easy, took less than 10 mins with a hacksaw, drill and hammer. I slotted it so I'd be able to fine tune it to work just right. I was so excited to test it out that I still haven't removed it to clean up and round it's sharp edges. Now that I know where the sweet spot is, whenever I do remove it to make it look better, I plan to slot a groove for the cable similar to the original Shimano design.

    The new M785 is very nice. I really like the two-piece frame attachment design because the B-adjustment screw no longer wears into my precious USA hand-made frame and the massive increase in spring tension (even with the clutch switched off) means I can get rid of all my gimmicky chain guide crap. Hoping for no more dropped chains on my 1-by setup!

    A few more things to note...
    - When used as Shimano intended, it takes about 2 and 3/4 of clicks of my 8-speed shifter to change 1 gear.

    - Yes with the shorter swing-arm there is more resistance at the shifter, but it's not as bad as I originally feared. Compared to before, it is a little bit harder to shift with the clutch switched off, and definitely shifts harder with the clutch on -- but even still it doesn't seem excessively hard to shift. I'm not worried about wearing out my right thumb or busting my shifter even with the clutch turned on. It's not that bad at all. For reference I am using an Aztec "Duracote" PTFE/Silicon coated cable.

    - In case you are wondering, there is a pre-existing shoulder that the top leading edge of my adapter aligns to and prevents it from rotating about the original cable tie-down bolt. I just simply drilled the hole in my aluminum piece such that the edge would ride right-up against this shoulder and lock it in place. Once the factory cable bolt is tightened down, it is mounted entirely rigid/solid.

    Here are some weight comparisons.

    Old XT M739 with some super-old Bike Nashbar lower alloy gear:



    New XT M785 minus my new cable adapter:



    So it's a bit heavier, however, here is my old M739 combined with all the funky shift & chain tension "enhancing" parts:



    I don't have the weight of the new derailleur with my cable adapter but it's possible I've saved a few grams in the end!

    Heading out to the San Joaquin River Trail tomorrow morning for a shake-down ride! Can't wait!

    Happy trails,
    BigMike

  38. #588
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    First ride report!

    Rode 15 miles and this derailleur is AWESOME. Here come some notes...

    1. Shifting Speed and Tension at the Shifter. This thing is lightening fast at shifting, especially up-shifting. It is many times faster than my older XT unit. Downshifting is a bit more difficult because there is more tension due to the stronger springs and the clutch, but as I got more seat time in I was getting the hang of having to press my thumb a bit further to engage up a gear. Towards the end of the ride I nearly had gotten used to it. It shifts REALLY quick if you jam the shifter forward fast (lower thumb lever / downshifting). It hardly skips teeth as it engages the larger sprocket. Up-shifts (index finger), man oh man they are lightening fast. No hesitation at all. BAM next gear, BAM next gear, very nice.

    2. Noise. With my old C.Guide my drivetain was already quiet but now without it + a stronger tensioned chain I get the same quiet operation but it's even quieter still because you don't have the sound of the chain dragging through the sleeve of the C.Guide.

    3. Chain slap. I rode about half the trail with the clutch on and the other half off. To be honest I can't tell a difference in chain slap UNLESS you hit a really big bump. Even with the clutch off, I only heard the chain slap around once. It is miles better than my old XT.

    4. Efficiency. This is biased because the bearings of my old derailleur gears were shot plus I had the drag from the C.Guide, but with the new setup I noticed straight away that there is less drag at higher cadences. It is much smoother. And when you back pedal the chain no longer "sticks" like before. It cycles through the drivetrain effortlessly.

    If you've got an old derailleur, really there is no excuse not to spend the $70 to get this new XT unit. It is miles better than my old XT; I should have done this a few race seasons ago!!

    Regards,
    BigMike

  39. #589
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    I read through this entire thread and couldn't find anyone trying this setup:

    I'm currently running a full SRAM X9 9-speed drivetrain with gripshifters. My long term plan is to switch to SLX 10-speed when my current stuff wears out. I am very curious to try trigger shifters now, though, since I've been running gripshift pretty much since they first came out but I don't want to invest in any more 9 speed equipment.

    So...has anyone tried a Dynasys 10 speed shifter with a 9 speed SRAM cassette and derailleur with the last shift position inactive? I know the lots of people are having success with SRAM 9 speed shifters/Dynasys rear derailleurs with slight cable mods, does that mean it will work the other way around?

  40. #590
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    Zombie thread!!

    So, I'm coming to the conclusion that I need to update my old XTR M952 cranks to modern cranks. I can either spend stupid amounts of money on the correct super rare spider to make it all work, or I can spend the same money on a set of 10 speed cranks.

    This is going on a 29er, running 9 speed dual control shifters.

    I heard, and correct me if I'm wrong, that there isn't much difference in the ring spacing from a 10 speed triple crank from a 9 speed triple crank... like fractions of a millimeter. Close enough to work with 9 speed drivetrain up front. Good. I don't want to give up my 9 speed only dual control levers quite yet.

    One of my concerns was being able to keep my 30t middle ring, which is hard to do with 4 arm 104 BCD cranks. The newer 10 speed triple seems to come with 96/64mm bcd 4 arm, with 22/30/40t rings. Almost perfect. I have an Action Tech 20t ring that takes some filing of the spider to get the chain to clear, but that shouldn't be too much hassle.

    Chain Reaction Cycles has the triple XTs in 180mm (my size) for $175 shipped to the USA. Not bad. I might do that if you all think it will work for me.

    So, it seems this would just be a matter of replacing the crankset and doing the mod for the granny gear, amiright?

  41. #591
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    Well, perhaps it is time for 11-10 drivetrain compatibility.


    Anyone know will the new 11sp 9000 XTR rear derailleur work with 10sp shifters?

    I'd like to use the new derailleur to swallow the 10sp 11-42 cassette without b-screw strain, and invest in possible 11sp conversion down the line.

  42. #592
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    Bought an XT front derailleur to replace the Deore front on my 2014 Pugsley. Just found out the XT front d is a 10-speed (had no freaking clue front d's went by cassette type) and my Pugs is a 9-speed. Am I screwed? If it matters, will be running a 9-speed SLX rear d (which I also just ordered to replace the Deore rear), Microshift 9-speed shifters.

  43. #593
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    Quote Originally Posted by rschreck View Post
    Bought an XT front derailleur to replace the Deore front on my 2014 Pugsley. Just found out the XT front d is a 10-speed (had no freaking clue front d's went by cassette type) and my Pugs is a 9-speed. Am I screwed? If it matters, will be running a 9-speed SLX rear d (which I also just ordered to replace the Deore rear), Microshift 9-speed shifters.
    It has nothing to do with cassette type. A ten speed chain is narrower than a nine speed. That said, I've been using a ten speed XT front derailleur with my nine speed XT front chain rings, crank and chain for years with no problem but it is a two ring specific derailleur. My cassette is nine speed.
    The trouble with having an open mind is that people will insist on trying to put things in it.

  44. #594
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    Quote Originally Posted by Ronnie View Post
    It has nothing to do with cassette type. A ten speed chain is narrower than a nine speed. That said, I've been using a ten speed XT front derailleur with my nine speed XT front chain rings, crank and chain for years with no problem but it is a two ring specific derailleur. My cassette is nine speed.
    Perfect. Thanks man.

  45. #595
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    My understanding, and I could be wrong, is that if you go with a 10sp crank, you need a 10sp derailleur. All other combo's will work 7 with 8, 8 with 9, 9 with 8 etc... Only the 10sp with 10sp is different. The shifters OTOH, are compatible. A modern 3sp front shifter will shift 7, 8, 9, or 10, except the 10 will shift differently to match a 10sp chainring spacing. The cable pull is all the same.

    I myself am running 10sp dynasys front and rear shifters, with 7sp front derailleur and crank, and 10sp XT rear. Since I almost never go off the big ring I don't pay much attention to the front shifting. It does seem to work, but the old derailleur is probably a lot stiffer than a new one so it takes some thumb muscle to shift. The rear is a very light touch.

  46. #596
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    The changed cable pull between 9 and 10 Shimano MTN only applies to RD's. The only issue you may have with a 9 speed train and a 10 speed FD is a little chain rub a the extreme ranges of the cassette. FD's for 10 speed chains are slightly narrower than 9 speeds -
    FWIW I ran a 9 speed drivetrain on a previous bike, Chain reaction cycles sent me a 10 Speed XT/Ultegra chain mislabled as a 9 speed, I didn't notice when I installed it (although having to adjust the FD at the time should have clued me in to the fact that something was different) The shifting was no different to the previous 9 speed chain and I used it till it wore out.

  47. #597
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    Quote Originally Posted by SimpleJon View Post
    The changed cable pull between 9 and 10 Shimano MTN only applies to RD's. The only issue you may have with a 9 speed train and a 10 speed FD is a little chain rub a the extreme ranges of the cassette. FD's for 10 speed chains are slightly narrower than 9 speeds -
    FWIW I ran a 9 speed drivetrain on a previous bike, Chain reaction cycles sent me a 10 Speed XT/Ultegra chain mislabled as a 9 speed, I didn't notice when I installed it (although having to adjust the FD at the time should have clued me in to the fact that something was different) The shifting was no different to the previous 9 speed chain and I used it till it wore out.
    While the cable pull is the same on 7/8/9 or 10 speed in the front, the movement of the derailleur is different with 10sp, it is slightly less because everything is narrower on the 10 speed crank. 7/8/9 speed cranks/front derailleurs work fine with 10sp rear and chains.

    Bottom line is this: If you have a 10speed crank, you need a 10speed front derailleur and vice versa. If you have a 7/8/9 speed crank you need a 7/8/9 speed front derailleur and vice versa. The front shifters are all the same. This is regardless of what you have in the rear.

  48. #598
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    Not quite; how far the FD moves is controlled the shifter not the derailleur itself. So a 10 speed FD is going move the exact same distance as a 9 speed FD with the same shifter. The only thing that's different is that the FD cage itself is slightly narrower on a 10.

  49. #599
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    No, that's not necessarily true either. The parallelogram can adjust the derailleur movement for the same shifter pull. Whether this is implemented or not in the case of 10 speed I don't really know. What I do know is that you need to use 10 with 10, even though the rest are mix and match.

  50. #600
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    Oh mighty MTBR forum members who know more than me, I have a stupid question.

    I am running a 9 speed drivetrain on my 2014 Surly Pugsley (screw you Surly for using 9 speed). It consists of a Deore Direct Mount front derailleur (sorry can't find the model number), an SLX M662 rear derailleur, Shimano CS-HG61 cassette, and a SRAM X5 crankset. I am currently looking to replace the Microshift Thumbshifters with Shimano shifters. I don't want Deore though.

    I found a pair of XTR M970 9 speed shifters for a really good price and I'm wondering if they will work with my front and rear derailluers. I'm tired of spending money on parts only to find out they won't work with a 2x9 setup.

    If they won't work can anyone tell me which shifters will? Besides the Deore shifters that are offered right now.
    Drink beer. 'Merica!

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