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  1. #226
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    Spin Cycle, I'll take those old 22T and 32T M970 chainrings if they don't have visible wear.

  2. #227
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    Quote Originally Posted by jabrabu View Post
    Spin Cycle, I'll take those old 22T and 32T M970 chainrings if they don't have visible wear.
    Send me a PM

  3. #228
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    Spin cycle, so you think that if i use the m980 26 -38 crankset, with all my m970 stuff, will work? Just setting the limits of the fd and maybe using a spavcer?

  4. #229
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    Quote Originally Posted by Noveloco View Post
    Spin cycle, so you think that if i use the m980 26 -38 crankset, with all my m970 stuff, will work? Just setting the limits of the fd and maybe using a spavcer?
    I measured everything before and after and the spacing between the chain rings is the same, as I posted the differance in the chain ring thickness is .003 if an inch ! Just got back from a 2 hour ride and no problems. I spent a good amount of time with it on the stands setting the height of my front derailluer (FD-970 low mount) currently set at 3 mm above the 38 t ring and shifting great. I should add that I all waays have run my chain line at 46.5 mm not the standard 50mm that is the stock set up for FC-M970 crank set, I just removed the center dust tube and run a .7mm spacer on the drive side and a 2.5 & .7mm on the non drive side this moved the chain ring into the frame 3.5 mm. Then add a 2 mm pedal spacer to equal it out at the pedals.

    The key is to buy the FC-800 chain ring bolts to get the 4.0 mm spacer unless you can find some really short female side bolts to mount the middle ring. It works better that I ever thought. PM me if you want .

  5. #230
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    Hello from Australia and a question...

    Hello everyone, first time on this site and I need some advice. I have decided to step out of my comfort zone and build a mountain bike. I am working on a Baum Titanium hardtail frame, medium size. I am up to the stage of trying to work out what size crankset to buy. After reading through some of the information on the posts I have established when it is stated 175mm that refers to crank arm length. I am 185 cms tall, so what length would you advise? Next question relates to bottom bracket. Does the length and width of bottom brackets vary or is it standard sizing for all mountain bikes. I am concerned that if I purchase a bottom bracket off the net, then I could be in the position of purchasing the incorrect size. If I need to get a particular size how would I determine the sizing. I know I sound like I do not know what I am doing, and you are right, but I guess that there is only one way to learn and that is from the hip pocket. I look forward to using this site for regular technical advice and if any of you guys are ever plan on coming out to OZ, please let me know as I am looking for someone to go riding with, cheers Ian

    This is what I am looking to purchase:
    Race Face Evolve Crankset SS 175mm
    Arms are net shape forged from high strength 6066 aluminum to maximize strength to weight ratio. All-Mountain strength at XC weight.
    High wearing 7075 aluminum chainrings feature extensive CNC machining for shifting accuracy and sharp looks.
    Evolve cranksets feature our 'EXI' interface external bottom bracket system for easier crank installation and removal with standard tools and fully adjustable chainline.
    Features the lightweight, forged and CNC machined CrMo steel EXI spindle.
    Bearings feature our custom triple wiper seal to better retain grease & keep contaminants out.
    Comes with the all new Race XC BB
    Bearings are factory filled with Phil Wood waterproof grease — tested & proven to extend bearing life.

  6. #231
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    ianjames9373,

    I'd go with 175 mm cranks.

    As for BB size, RF EXI type cranksets can be installed out of the box on 68 and 73 mm BB shells. Measure BB shell width on your frame, it is likely 68 or 73 mm. Also verify that the threads are English standard (left hand thread at the right side, right hand thread on the left side).
    26" faithful.

  7. #232
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    ok i have been out of the biking scene for a while and notice this 10 speed set ups now. i have tried to read through this whole thread but just looking for some quick answer. i have a 9 speed set up right now. and planning to get a new bike with a 10 speed drive train. all i want to swap from my 9 speed to me 10 speed is my 26/36/48 crankset will this cranset be compatible with the 10 speed set up?

  8. #233
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    No. I've been down this path and it wasn't pretty. 1st I tried just running my same old 2x9 Dues XC crankset and the new 10 speed chain would get stuck in between the rings and not seat properly on the teeth. 2nd I tried changing to 10 speed rings and keeping the cranks, this just made the chain getting stuck between the rings worse. Chainring washers didn't help, because it weakened the rings and allowed them to flex. 3rd I ordered an X9 2x10 crank and F. derailleur, mounted it, and now I ride with no issues and a stiffer more direct crankset.

    Don't make the mistakes I did. Just get a complete 10 speed drivetrain.

  9. #234
    the catalan connection
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    My own kind dyna-sys

    I decided to get rid of the TOO large 44 outer on my crankset. Got a 40 outer and also thought that would´t hurt to have the same tooth diff from the small to the 32 middle so also got a 24 small. Now the drivetrain is 24-32-40. Pretty much like a dyna-sys. Note there is always a 8 teeth jump from either ring. Feels nicer. All drivetrain is 9 speed.Also got a 11-34 cogset to compensate the larger 24 granny.
    The problem came when I tried to adjust the front derailleur.(still a 9sp low clamp XTR) There was no way to get it right. Since the larger ring was way smaller I had to move the derailleur down, but then the inner cage would jam with the middle chainring. That forced me to leave the derailleur way upper than I liked and shifting was never good. But looking closer I found that a derailleur with a less tall inner cage would clear the middle ring just fine and started looking for it. I went to the LBS and started checking different derailleurs. All looked more or less like have the same problem.Then I got a XTR 10 sp dyna-sys on my hands, placed on the bike and was looking like it would clear it. Went home, installed it and...voilà! Shifts perfect (remember I use 9 sp shifters, xtr), it doesn´t rub in any combo, it drops to the small instantly (also a problem to solve with the low-clamp 9sp xtr I had before) Instant and crisp shifts. I really mean it when I say is the best adjusted derailleur I had in my 18 years of riding.
    I don´t know if it would perform tha same on a normal 22-32-44 crankset, I dunno it. But if you go the same route of trying to make your own kind of dyna-sys crankset is definitely the way to go.
    Attached Thumbnails Attached Thumbnails Dyna Sys 10 speed compatability with 9 speed (Shimano systems)-p1040214.jpg  

    Dyna Sys 10 speed compatability with 9 speed (Shimano systems)-p1040216.jpg  

    Dyna Sys 10 speed compatability with 9 speed (Shimano systems)-p1040215.jpg  

    "Blessed is the man who, having nothing to say, abstains from giving us wordly evidence of the fact." George Elliot

  10. #235
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    so what is the answer here.

    I have a 3x10 system (24,32,42) with 11-36.

    I want to change this to 2x10 w/bash (racefacelight bash) (24, 36) 11-36.

    What 36T chainring would be best for this?

  11. #236
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    how about a 10 spd rd and shifter and a 9 spd sprocket??

  12. #237
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    Quote Originally Posted by DeeEight View Post
    Because in order to improve the reliability of the mtb 10 speed shifting, shimano has finally admitted to themselves that SRAM had the right idea lowering the leverage ratio of the rear derailleur cable pull geometry (which makes the derailleur less sensitive to cable stretch and tension changes from shifter housing movement on a rear suspension bike). So the shifters now pull more cable than before for each shift. SRAM's 10 speed shifters and derailleurs also pull more cable than their 9 speed units. I believe the SRAM 10 speed works out as a 0.8:1 ratio now, their 8/9 speed stuff is 1:1, all shimano derailleurs except the new 10speed mtb (and the 7/8 speed DuraAce) are 2:1 and the shimano 10s MTB is I believe its been measured out as something like 1.25:1.

    I know I'm dragging up an old post here, but from what you're saying, in theory you can set up a 10 speed system using the new xt/xtr front shifters with the old xo 9 speed rear mech & a 10 speed cassette.
    pain & fear is natures way of telling you you're getting old!

  13. #238
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    Quote Originally Posted by karl711 View Post
    I know I'm dragging up an old post here, but from what you're saying, in theory you can set up a 10 speed system using the new xt/xtr front shifters with the old xo 9 speed rear mech & a 10 speed cassette.
    I've just re-read the whole thread and based on what people tried and reported, 9sp SRAM rear ders are in fact interchangeable with 10sp Dyna-Sys units.

  14. #239
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    Read the whole thing as well....but couldn't find the answer to my question. Will the SRAM 10 speed chain(s) and cassette(s) work with the Shimano Dyna-Sys 10 speed RD (1x10 setup)?

  15. #240
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    Quote Originally Posted by Gokart2 View Post
    Read the whole thing as well....but couldn't find the answer to my question. Will the SRAM 10 speed chain(s) and cassette(s) work with the Shimano Dyna-Sys 10 speed RD? Can't exactly figure out how and why EXACTLY the Shimano chains are directional...? I know it's for "the bestest shifting in the galaxy", but thats about it.
    You should not run into any issue using the XT Dyna RD- the special profile/directional chain only affects the outside of the chain_
    I Just wish I could ride more!


  16. #241
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    Shimano XT, SLX Go 10-speed In 2010 | Cyclingnews.com
    "Chain (CN-HG94): The new HG-X 10-speed chains are directional (the right-hand side is optimised for front shifting and the left for rear shifting), so make sure you fit them with the logos on the outside. The zinc alloy plated XT version costs £34.99."

    Cant figure this out for the life of me....

  17. #242
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    2 x 9 problem in 38 x 11 combo !

    Quote Originally Posted by Spin Cycle View Post
    I measured everything before and after and the spacing between the chain rings is the same, as I posted the differance in the chain ring thickness is .003 if an inch ! Just got back from a 2 hour ride and no problems. I spent a good amount of time with it on the stands setting the height of my front derailluer (FD-970 low mount) currently set at 3 mm above the 38 t ring and shifting great. I should add that I all waays have run my chain line at 46.5 mm not the standard 50mm that is the stock set up for FC-M970 crank set, I just removed the center dust tube and run a .7mm spacer on the drive side and a 2.5 & .7mm on the non drive side this moved the chain ring into the frame 3.5 mm. Then add a 2 mm pedal spacer to equal it out at the pedals.The key is to buy the FC-800 chain ring bolts to get the 4.0 mm spacer unless you can find some really short female side bolts to mount the middle ring. It works better that I ever thought. PM me if you want .
    Adjusted everything change chain line and everything works great except the 38 x 11 , I need this 11 tooth cog on downhills and if I ready loadup the torque it slips on the cog then will catch. Tried differnet b screw setting chain line looks great and can run the 38 x 34 combo ( alot of chain angle ) that what I can't figure out as I space the chainline back out to 46.8 mm only using one 1.8 mm spacer on the drive side instead of qty 2 2.5 mm and the 38 x 11 looks great still slips any help ???

  18. #243
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    I have the 2011 XT Dynasis 3x10 system and just ordered their new 2x10 crank. My question is do I need to order the new 2x10 front derailleur and the new version front shifter that converts from 3 ring to 2 or can I run what I have and just change the limit screws on the derailleur?

  19. #244
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    WHich Chain, XTR M 980 vs. KMC X-10SL ??

    How running waht chain?? Current set up 10 speed XTR M980 38/26 cranks & 9 speed XTR M970 Cassette.
    Heard alot of good things about the KMC chains , anyone running the new 10 speed XTR chain w/ 9 speed cassette ?

  20. #245
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    Edit-

    The old XTR rear derailleur and the new Dyna Sys rear derailleur don't use the same ratio, from what I've gleaned here.

    I was hoping to use my old 9 speed shifters with the new XTR rear derailleur.

    Waaaaaaaah! Oh well...
    Last edited by Gregg K; 08-29-2011 at 12:31 PM.
    Note to self: 85% of FTP for 20 min.

  21. #246
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    Hello

    I'm gonna ask several questions here because I can't create a new thread due to low post count so please bare with me and eventually answer my questions.

    I'm gonna purchase a Specialized Epic Comp that comes with:
    FRONT DERAILLEUR : SRAM X.7, 10-speed, S3 direct mount for DMD, bottom pull
    REAR DERAILLEUR: SRAM X.9, 10-speed, long cage
    SHIFT LEVERS: SRAM X.7, 10-speed, aluminum trigger
    CASSETTE: Shimano HG81, 10-speed, 11-36t
    CHAIN: KMC X10, 10-speed, w/ reuseable Missing Link, nickel plates
    CRANKSET: Custom SRAM S-1250, 7050 alloy arms, 10-speed triple, GXP spindle, S: 170mm, others: 175mm
    CHAINRINGS: 44A x 33A x 22S, 4-bolt, 104/64mm
    BOTTOM BRACKET: SRAM GXP, outboard bearing

    I also own a almost-new 2011 Dynasys XT transmission.

    I have no knowledge whatsoever of SRAM transmission so I wonder if my current transmission is much better than Specialized setup and if:
    1. I should swamp it all (will the crankset fit the frame? which XT front derraileur I need to buy for that frame?)
    OR
    2. Upgrade shifters and front derailleur to X9 and cassette to XT.
    OR
    3. Swap only some parts.

    Thanks in advance!

  22. #247
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    FaithRaven, I'd leave the front derailer as is and install everything XT that would fit.
    26" faithful.

  23. #248
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    Thank you for your response.

    It is that big of a difference between the 2 transmissions ? Even if I upgrade cassette to XT, shifters and FD to X9 ?

  24. #249
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    The difference is not big enough to justify buying full XT drivetrain instead of what is on the bike, but since you already have it, why not swap?

    There is no single decisive advantage, but a sum of small ones, each gained from respective component.
    26" faithful.

  25. #250
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    I have brain ache from reading through this over and over...just to confirm

    I have a CX bike running 10sp 105 (5600 I believe) I want to switch over to a flat bar.
    Rather than spending over $200 for the flat bar road shifters (which apparently will not work with the 105 F derailluer) , I'm hoping that I could run some 9sp LX or XT shifters for the rear & front derailluers. Correct ?

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