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  1. #1
    mtbr member
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    Join Date
    Jul 2006
    Posts
    275

    Crank Arm Length

    I see the new XT Dyna Sys Cranks are available in 165mm, 170mm, 175mm, and 180mm. Why would you choose one length over another? Is it a matter of preference for the torque or a matter of proper fitment? FWIW, I'm 6' tall with a 33-34 inch inseam and ride a large frame.

    Fred

  2. #2
    Feral Roadie
    Reputation: bbense's Avatar
    Join Date
    May 2010
    Posts
    716
    It's a matter of great and largely meaningless debate in the absence of any studies.... In general the longer your legs, the more benefit you get from longer cranks.

    Personally, I like 165mm cranks since my knees hurt when I ride 175mm cranks. Most crank length "formulas" would have me on 170mm cranks. This is a reasonable article

    http://bicyclecranklength.blogspot.com/

    - Booker C. Bense

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