force road shifter x9 rear derailuer

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Permalink Reply by David whitlock on May 19, 2012 at 12:30pm

What's the problem?

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Permalink Reply by michael moyer on May 19, 2012 at 1:12pm

Not dropping down into 11t gear. And when it does trying to go up one it skips

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Permalink Reply by David whitlock on May 19, 2012 at 7:52pm

Did you use a spacer behind the cassette?

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Permalink Reply by michael moyer on May 21, 2012 at 6:47am

Yes

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Permalink Reply by David whitlock on May 21, 2012 at 9:27am

Did you adjust the H/L limit or B screws (6mm between top pulley wheel and largest cog) when you swapped cassettes?

It sounds like either a crimped cable/dirty housing, a bent hanger or misaligned limit screw, but the kicker is that the shifting improves with the XT cassette.

What about the chain? Did it wear with the XT cassette? I have a old SRAM 11-28 cassette and 1091R chain that will only work when paired together and nothing else.

What are the differences between the 11-28 and the XT cassette?

What about the freewheel? Is it loose (movable side to side)? Are the bearings and pawls happy?

Very interesting problem.

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Permalink Reply by Patrick Shank on May 21, 2012 at 6:21pm

are you using the lockring that came with the 11-28 cassette?  if you're using the one from the XT cassette, and it had a 12t low cog, that might be your problem - if it is, you just an lockring for an 11t cog.

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