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Old 09-14-10, 07:58 AM   #1
Cyclesafe
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36T cog and rear derailleur compatability

I have the following derailleurs in my parts box. Will any of them work with the new 36T cassettes?

XTR 9-sp M952
XTR 9-sp M971
XT 9-sp M770

I know that Shimano says that 34T is max, but what is the reality in the real (money limited) world?

Thanks in advance for your help.
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Old 09-14-10, 08:29 AM   #2
well biked 
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There is literally no way to know other than to try them. There's enough variation in distance/angle from center of axle to center of derailleur mount to make a difference of a few teeth compatibility. I've had mtb derailleurs bump a 34t cog. We've got the 29ers in our shop with 36t cogs equipped with new Shimano mtb derailleurs and they don't hit the cog. Again, try and see.
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Old 09-14-10, 02:19 PM   #3
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I posted the same question a while back. Are you talking about the new shimano SLX 36 tooth cassette in the 9 speed? I think one of the solutions was to get a longer b limit screw to get the cog away fro the 36 gear. I think it would really max out the springs, let us know how it works out.
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