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  • This topic has 3 replies, 3 voices, and was last updated 8 years ago by jonk.
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  • 105, 10 speed GS rear mech.32 or 34?
  • Turnerfan1
    Free Member

    Toying with my gearing for the 3 Peaks.
    Looking at running a 34 low sprocket on the cassette.
    I know the recommended is 32 tooth.
    Just wondering if any one is running this size or should I stick with the standard 32 tooth.
    Gonna run a 46/34 chainset if that’s a help.
    Thanks,
    Max

    Posted 8 years ago
    jam-bo
    Full Member

    It’ll just about work on a 32, you may need a longer b-screw.

    Best best is an older 9 speed MTB mech

    Posted 8 years ago
    cp
    Full Member

    As above, I’d stick with a 9 speed MTB medium cage mech.

    10 speed 105 is only officially rated to 27 or 28 teeth. I know folk get away with using larger but it’s not ideal and I think you might be really pushing it at 34. No use having the gear if it’s not going to work too well, particularly in a race.

    Posted 8 years ago
    jonk
    Full Member

    i’ve run an MTB 10 speed 11-36 cassette with an Ultegra GS rear mech with out any issues.

    Posted 8 years ago
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