• As is 6700, and while both 6600 and 6700 (and any other 10 speed Shimano road shifters) will work with a 9 speed MTB mech, as the cable pull ratios are the same, neither will work with a 10 speed MTB mech, which has a different pull ratio.

  • I see, that's pretty good to know.

    Is there such thing as a Shimano 9sp mech with a clutch?

    I have 6600 shifters I could use for CX. I have the mech too but wonder if a 9sp MTB mech has any advantages? Less chain-suck?

  • Cheers! Found it.

    As is 6700, and while both 6600 and 6700 (and any other 10 speed Shimano road shifters) will work with a 9 speed MTB mech, as the cable pull ratios are the same, neither will work with a 10 speed MTB mech, which has a different pull ratio.

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