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  1. #1
    caffeine dependent
    Reputation: bstiff's Avatar
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    what 2x9 do you run?

    I searched briefly for 2x9 threads, didn't see anything.

    I've run a 2x9 setup on my XC hardtail for several years, originally Shimano stuff except for Cannondale Expert (Expert must mean "crap" in Cannondalese) cranks. I wore out the splines on three sets of cranks, then changed my drivetrain to SRAM X.0 last year. The stuff works great, and SRAM gave me great service when I had to replace the upper half of a shifter pod after a bizarre crash.

    I had a real pain in the ass coming up with a 29/44 ring and crank combination last time around. I'm dreading the googling I'll have to do next time, because I'm sure 94 BCD cranks are getting that much more rare. I came up with a pair of Ritchey square-taper 175's this last time, a Ritchey 44T big ring, don't recall the brand on the 29T ring. It seemed like the stuff was fairly uncommon, QBP had only a couple (expensive) listings for the parts I wanted, and no LBSs had anything in stock.

    What do you run on your 2x9 rig for a drivetrain (cranks, rings, etc)? Where did you get your stuff?

  2. #2
    Formerly DMR For Life
    Reputation: Full Mountain's Avatar
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    nothing special here
    raceface evolve DH cranks 22/32 rings
    Truvita BB (not sure which one it works thats all i know)
    XT FD
    X.9 RD
    Sram Chain and cassette

    all locally sourced through my previous LBS
    DMR

  3. #3
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    Lovin' the 2x9...

    set-up. I removed the granny for good this summer. Running 29/42 x 11-34. The 29-tooth middle ring is from Boone. Yep they aren;t cheap, but they do last. The outer ring is an Action-Tec heat treated Ti 42-tooth thats almost three years old and shows almost no wear. I am going to replace it with a Boone 40-tooth outer, i'd like to use th eouter ring more and would with the 40-tooth.

    I am running 1x5 on my winter bike. This was of an excercise in trying something new. Saw a similiar (albeit less of a Rube Goldberg) on some of Jeff Jones' bikes. I liked the simplicity of the 1x9 and had tried single speeding a few times and my tired old knees couldn;t handle it. This is my compromise.
    MTBDad
    MCM #47.867

    "Freedom has a scent like the top of a newborn baby's head" - Bono

  4. #4
    Just ride.
    Reputation: Lothar Othp's Avatar
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    Bonking ... not feelin' well Race Face 29x44

    Old School Race Face Turbine LP square taper compact crank. 44t race face ring, 29t Coda (Cannondale) ring. I had to use a few mm worth of spacers to get the chainring spacing right. I use a Race Face taperlock BB with adjustable chainline so I can compensate for my 2x9 setup. I run 11x32 on the back. I love this setup but its got quite a few miles on it. I am also having trouble finding a suitable replacement drivetrain and hopefully won't be forced to ride a 3x9 when this thing dies. I got the Coda chainring from Speedgoat years ago but doubt they have any left. The only 2x9 alternative I've found is from FRM (I think they're Italian). Stan sells them on his website www.notubes.com but they're not cheap.

  5. #5
    mechmann_mtb
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    i am pretty sure that FSA makes a compact crankset.

    if you are talking about a 29T middle ring, it seems to me that a 30T is close enough. Extralite makes the 30T middle ring for 104BCD and that is what i have on my 1X9 setup. to be honest i didn't really notice a difference going from 32T to 30T, i made the change and stuck with it as i hope that on epic type rides i might be able to conserve just a tad more energy on those long fireroad climbs.

  6. #6
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    Middleburn

    You can get a middleburn duo in 29/42 or 29/44 they come as a RS7 or a lighter RS8. They both come in square or Isis tapers. I would reccomend the square taper teamed with a Phil Wood bottom bracket. 108 spindle with adjustable chainline.

    Good Luck

  7. #7
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    Reputation: BikeMk's Avatar
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    I run a 24-36-bashguard on a large (heavy), well suspended bike. Made by Truvativ. Other than when riding on roads I've never really used a 42 or 44 tooth ring much except for chain tension on the downhill. Maybe it's just a matter of steep terrain?

  8. #8
    caffeine dependent
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    Quote Originally Posted by DMR For Life
    nothing special here
    raceface evolve DH cranks 22/32 rings
    Truvita BB (not sure which one it works thats all i know)
    XT FD
    X.9 RD
    Sram Chain and cassette

    all locally sourced through my previous LBS
    DMR
    Yeah, I'd thought about going with a setup like yours with the smaller rings, but I'd run way out of gear on fast sections.

  9. #9
    caffeine dependent
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    Quote Originally Posted by MTBDad
    set-up. I removed the granny for good this summer. Running 29/42 x 11-34. The 29-tooth middle ring is from Boone. Yep they aren;t cheap, but they do last. The outer ring is an Action-Tec heat treated Ti 42-tooth thats almost three years old and shows almost no wear. I am going to replace it with a Boone 40-tooth outer, i'd like to use th eouter ring more and would with the 40-tooth.

    I am running 1x5 on my winter bike. This was of an excercise in trying something new. Saw a similiar (albeit less of a Rube Goldberg) on some of Jeff Jones' bikes. I liked the simplicity of the 1x9 and had tried single speeding a few times and my tired old knees couldn;t handle it. This is my compromise.
    Thanks for the input. I'll look for those rings. My Ritchey crank should last a while, but the crummy alloy rings I have now are going to need to go away when it's time for a new chain. My SRAM cassette still looks good.

    What cogs are in the stack on your 1x5? I have a 1x9 that I left at my company's office in California so I can get some exercise when I travel for work. When I'm at home in CO, I prefer to either ride the bike with more gears for long, steep rides, or the single speed for more challenge. My buddy Cary had good success racing a 1x9 last summer, but since I was racing the single-speed class, I didn't have that option.

  10. #10
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    I took the Cogs from...

    my Cycle Dynamics cassette. All the cogs are separate. Only issue is to make sure your drive shell is Stainless steel or it'll get chewed. I am using 13-17-23-26-30. I have a 31-tooth Boone SS ring up front. May well drop one of the cogs and try 13-20-26-30, but this is more of an excercise in winter tinkering than anything else.


    Thanks for the input. I'll look for those rings. My Ritchey crank should last a while, but the crummy alloy rings I have now are going to need to go away when it's time for a new chain. My SRAM cassette still looks good.

    What cogs are in the stack on your 1x5? I have a 1x9 that I left at my company's office in California so I can get some exercise when I travel for work. When I'm at home in CO, I prefer to either ride the bike with more gears for long, steep rides, or the single speed for more challenge. My buddy Cary had good success racing a 1x9 last summer, but since I was racing the single-speed class, I didn't have that option.[/QUOTE]
    MTBDad
    MCM #47.867

    "Freedom has a scent like the top of a newborn baby's head" - Bono

  11. #11
    mtbr member
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    Just an idea, FSA makes compact cranks with a 34/46. Cept your knees would take a beating. You could use a 24 in back to step it down, assuming you run disks. I know this is completely useless, but i think it'd be a cool solution to a problem you don't really have

  12. #12
    Just ride.
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    Quote Originally Posted by gdunha
    You can get a middleburn duo in 29/42 or 29/44 they come as a RS7 or a lighter RS8. They both come in square or Isis tapers. I would reccomend the square taper teamed with a Phil Wood bottom bracket. 108 spindle with adjustable chainline.

    Good Luck
    Thanks. Does any mailorder places in the US have these?

  13. #13
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    Middleburn USA

    Quote Originally Posted by Lothar Othp
    Thanks. Does any mailorder places in the US have these?
    Nope. The best price I found was www.activesport.co.uk. I did order a set for them the price and shipping were pretty reasonable.

    Gary

  14. #14
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    Another option would be to get a tradtional five arm crank with 110 & 74 bolt patterns. You could run a 28t or 30t small ring (commonly available for touring) and what ever size middle ring you want, from 34t up. If you have a hard time finding cranks, search for touring cranks which are still available in that bolt pattern. This is what I am doing on my Karate Monkey, only I have smaller rings to make up for the larger tires.

  15. #15
    Transition Blindside v5
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    Truvativ RockGuard bash on XT crankset

    Mine's nothing special, either - just a straight swap of 44T-vs-bashring.

    * XT FC-M751 crankset (44-32-22T, 104mm/64mm, 4-bolt, with 175mm arms)
    * Truvativ RockGuard (Lexan polycarbonate) bash guard (4-bolt/104mm), 142mm (5 3/4") diameter, 10mm thick = 99g/plate + 28g/bolts = 127g

    Actually, the 22T & 32T on it are both steel. I think they were either LX (or even sub-Deore level?), just so that I can have steel. And I think they really lasted a long time for me (granted I replace my chain often). But, timing-wise, I'll finally need these rings replaced some time soon, so I'm thinking of picking up Truvativ Trushift 22T & 32T rings in steel this time around.

    On the side note, other drive stuff...
    * SRAM X.9 derailleur ('medium' cage) = 247g
    * SRAM X.9 trigger shifters = 252g/pair
    * SRAM PC-69 chain
    * SRAM Nightcrawler front derailleur cable sealer
    * XT FD-M751 front derailleur (34.9mm) = 137g
    * XT BB-ES71 bottom bracket (68mm x 113mm) = 254g
    * XT CS-M750 cassette (11-12-14-16-18-21-24-28-32T) = 264g


    Cheers,
    - PiroChu
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    Northern California (Bay Area)

  16. #16
    Mantis, Paramount, Campy
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    2x9 Eh?

    My 2x9 is setup with 48-36 rings and a 12-27 cogset.
    110/74mm crankset with the inner ring removed and an Ultegra cassette.
    I figure that since people singlespeed at 2:1 or 1.8:1 that my 1.33:1 ratio is plenty low.
    *** --- *** --- ***

  17. #17
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    Here's my story....

    I got a cannondale hardtail back in '99 which came with a 2x9 setup. It had 44/29 x 11-34, coda rings on coda cranks with a shimano square taper BB. The rings lasted forever, shifted great, but have since worn out. I rode this thing everywhere, commuted everyday on it, and reckon I did close to 15,000km on it. I kinda got used to 2x9.

    Meanwhile, I built up an ellsworth, and went for the new XTR cranks when they first came out (early 2003). I built up the dream bike, but it was ruined by the performance/shifting of the cranks. I put up with them for over a year. I could never get them to shift properly (the chainline sucked, way too wide), found that I rarely needed the granny (nor could shift to it if I tried, most of the time), and then started getting chainsuck from the middle ring within 6 months, as it was wearing out really quickly. That XTR crankset has now sat in the cupboard for over a year, because I put a 2x9 setup onto it in mid-late 2004. At that time, I knew that I needed/wanted a 2x9 setup for the bike, and had a really good look around at what was available. I needed a 94mm BCD crank that had a narrow chainline. The outboard bearing stuff was out of the question (chain line too wide), but I did see the initial drawings of the FRM 2x9 outboard bearing crankset about to come out, but couldn't wait, and they are a bit of an unknown, as no-one seems to have them, no reviews etc. Even though I heard horror stories about ISIS, I looked at those extralite 2x9 cranks (not 5 bolt, but they make a 4 bolt 30T cog, couldn't get in 170mm), the middleburns (I think they had a strange bolt pattern, so it would be difficult to mix cmponents across my bikes), the race face Next LP ISIS (didn't have any 170mm left), the RF turbine LP ISIS, and the FSA Afterburner world cup which comes with the right rings (a 29T, and a 44T with specially designed ramps to suit the 29T). In mid-late 2004, I managed to get hold of a set of the very last turbines in my size, and a set of the afterburners with rings (thanks to larry finding them). This was around the time when all the manufacturers were changing over to the outboard bearing stuff.

    The race face turbines went on the ellsworth, with the FSA rings from the afterburner crank, on a Race face signature Ti 108mm ISIS BB. I was was pretty damn happy that night when I went for a test ride, and am still smiling. Finally, I got the shifting performace that my hardtail always had. The ellsworth was finally "complete".

    on the hardtail, the orignal coda cranks where taken off (now waiting for a donor bike), and the FSA afterburner crank when on it with a 108mm RF signature XS BB. I originally put a FSA 29T & Salsa 42T chainring on it, but had some strange slipping problem with the salsa chainring (the chain was jumping off the chainring under load, even when in a parralel rear cog), so I picked up an older model shimano XT 44T cog, and that worked pretty well - didn't shift quite as well as the FSA 44T cog though (near perfect). Since then, the hardtail has been retired from offroad duties, is now exclusively a commuter, and I've put on a road gearing setup: 46/34 blackspire chainrings and 11-23 shimano road cassettes (dura-ace & ultegra). I have had absolutely no problems with it, but I think the BB is on the way out, so I am looking at options for a high mileage BB - I'm pretty sure the old RF docs stated that bearings are replaceable, so I'm looking into that at the moment.

    The kind of terrain I ride (rolling hills, no huge ones) means I almost never feel the need for a 3x9 setup, with the granny gear. However, I went in a 100km event last year which had 3 monster climbs where a lower gear would've come in handy, so I'll be slapping the XTR crank onto the ellsworth specifically for this year's event. Other than that, 2x9 all the way.

    For the future, I'm very interested in hearing anyone's experiences with outboard bearing BB/cranksets, running a 2x9 system (that's the "XC" 2x9, which is a 29/30T small ring and ~42/44T big ring). Something like the FRM setup. I'm particularly interested in the chainline (must be narrow), and shifting performance.

  18. #18
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    i just got a pair of stronglight oxale 2x9 cranks. they weren't very expensive, maybe $150. they're isis, and come with 29/44 rings.

    they tipped the digital scale at 620 grams. they have steel self-extracting bolts and steel chainring bolts, so i plugged in some nice fsa crank bolts and aluminum cr bolts and they're an even 600 grams now, 740 grams with an american classic isis bb.

    they seem like they're made pretty well. the info stated that a 113 spindle would be necessary, but they're a little picky about the big ring and bigger cogs with that setup. i have a 108 spindle, and that solved that issue quickly, and there is plenty of clearance room at the stays. the rings look nice, but don't shift as well as my race face rings, so i may be substituting the big ring with the race face. i'll leave the 29t stronglight ring.

    just an option for 2x9 users.

  19. #19
    I can't weld
    Reputation: Indiefab's Avatar
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    Mine's actually 1x9

    I just finished installing the last pieces last night. Thanks JensonUSA!

    Truvativ Hussefelt with 32T and aluminum bashguard; 22T removed
    Truvativ DHLT BB
    NGear Jumpstop
    SRAM PC-991 chain, solid pin, shortened for 1x9
    SRAM X.O long cage
    SRAM PG990 cassette, 11-34, the red one
    SRAM X-7 rear shifter
    Full Nokon cable housing
    I overbuilt this thing since I'm >200# and riding a very rigid hardtail on rocky and rooted trails. I like the simplicity and reliability of the single front gear. Much less chainslap with the shortened chain. It has made me a better rider since I'm not thinking about bailing out into the granny gear on a short climb. I just pick a line and hammer.
    I'm going to test out the new shifter and derailleur today and post pics in my own thread, look for it there.

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