- Shimano road mech compatibility
I used to know where I stood when it came to Shimano 9/10-speed rear mech compatibility between road and mountain bikes (or at least I thought I did), but I’m not so sure with the latest incarnations.
I want to use a 9-speed road cassette on my DH bike and I need to get a compatible rear mech. I know that the actuation ration has changed for XTR 10-speed (lower ranges too?) but has the same thing happened with road mechs? For example, could I use an Ultegra 6700 rear mech, or do I need to hunt around for an older model?Posted 5 years ago
Thanks for the reply, but I think you’ve missed the point, but you may have answered my question anyway. I have 9-speed shifters and cassette. The cassette is a road close-ratio cassette so I don’t want to use an MTB mech.
From what you’ve said, it would imply that I can use any current 10sp road mech. However, I seem to remember hearing somewhere that Dura Ace 10sp was no longer compatible with other 10sp shifters due to a change in the actuation ration (and hence would also no longer be compatible with 9sp shifters) – perhaps I’m getting this confused with XTR. Can anyone verify this? Does this apply to any other 10sp mechs in the Shimano road range?Posted 5 years ago
Nice one, that clears things up. A bit of internet searching suggest that my confusion over incompatibilities between Dura Ace and other road groupsets is difference in the brake/shifter units, with Dura Ace units pulling more brake cable rather than any difference in the gear actuation ratio.Posted 5 years ago
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