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I have question about crank arm length. Given that longer arms provide more leverage is there any downside to using the longest arm that does not cause interference? I am pondering any tradeoff and cannot think of any reason to not use the lengest arms that are safe.
 

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meh....
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trail(er)trash said:
I have question about crank arm length. Given that longer arms provide more leverage is there any downside to using the longest arm that does not cause interference? I am pondering any tradeoff and cannot think of any reason to not use the lengest arms that are safe.
Crankarms that are too long for "your legs" could create knee problems.

Monte
 

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I agree that too long a crank can place extra stress on the knees when spinning. But if there are no knee problems crank arm length is always a compomise between levarage (torque) and spinning efficiency.

Remember that leverage can be addressed by appropriate gear ratios, but spinning through a too large circumference can create too much fatigue (even when the force applied is reduced by appropriate gear ratios).
 
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