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  1. #1
    human velocipedio's Avatar
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    Crankset opinions?

    i'm planning to get a new crankset, and I've been leaning toward going with something a bit longer. i have 170 mm on my road bike, and 170 on my 'cross bike right now. would i notice much improvement by going up to 172.5? problems? i'd like a bit more of a push going up sharp hills.

    [my inseam, by the way, is 77.5 cm, and i have shortish calves...]
    when walking, just walk. when sitting, just sit. when riding, just ride. above all, don't wobble.

    The Irregular Cycling Club of Montreal
    Cycling irregularly since 2002

  2. #2
    WallaWalla! Rotifer's Avatar
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    The problem I have with longer cranks is that I tend to smack the sides of ruts, roots and rocks. I can't tell you off hand what length my cranks are, but I'll check if you are interested. Of course, our courses tend to be fairly rough in parts - yours may be a bit different.
    Jeff

  3. #3
    human velocipedio's Avatar
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    our courses seem to be designed by mountain bikers... i thought of the rut problem, but i'm not sure 2.5 mm [1/10 of an inch] will be that much of a problem, and taller riders with 175 mm cranks don't seem to have much trouble...

    in any event, i ordered a 172.5 mm crankset. i'm looking forward to seeinbg it friday. thanks.
    when walking, just walk. when sitting, just sit. when riding, just ride. above all, don't wobble.

    The Irregular Cycling Club of Montreal
    Cycling irregularly since 2002

  4. #4
    Oh God, He's back! 1oldRoadie's Avatar
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    my wife can tell the difference between a 172.5 and a 175 in less than a mile of riding. She's a 5'6 american longstemmmed beauty.

    It seems that cranklength is more a function of thigh length than total leg length.

    The above being said, you really need to try riding a 170, 172,5 and 175 to see which feels better.

    The difference in length will not have much impact on gearing but more in your cadence and bike feel.
    I can't ride and Frown!

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