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  1. #1
    Senior Member brooklyn's Avatar
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    Crank Arm Length

    Is there a noticable difference between a 170mm and 175mm crank arm lenth? If so how will this change my riding?

  2. #2
    Get the stick. darkmother's Avatar
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    You can feel the difference, especially when you first change over. All in all, it is a pretty small change-only 3% difference. It will give you slightly more torque, but be a little bit tougher to spin fast. Personally, I ride both 170 and 175 on different bikes, and there is not that much functional difference.

  3. #3
    Go Like Hell Habu2112's Avatar
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    Mother is right. A shorter crank arm is easier to spin. A longer crank gives more torque. I have a 172.5 on my road and a 175 on my mountain bike. Also, most smaller frame bikes have shorter cranks, most larger frame bikes have longer cranks (from the factory).
    Eat Right,Get Lots of Sleep, Drink Plenty of Fluids, Go Like Hell

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