Old 03-23-15 | 11:54 AM
  #4  
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FastJake
Constant tinkerer
 
Joined: May 2010
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From: Madison, WI
Originally Posted by Booger1
Surprize! Not all BB are symmetrical.....
Yep. As long as the left arm doesn't hit the frame it's not a mechanical issue. When you install your crank check your chainline to make sure it's in the ballpark. A couple millimeters either way usually isn't an issue with derailer gearing but if it's too far off stuff gets wonky.

If one arm is much further in/out than the other it's possible your legs won't like it. But I've never experienced any discomfort in practice.

Not all cranks provide symmetrical "q-factor" or tread either.
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