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Old 03-11-16 | 09:42 PM
  #7  
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Homebrew01
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Joined: Jul 2004
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From: Ffld Cnty Connecticut

Bikes: Old Steelies I made, Old Cannondales

Yes, Bottom bracket axle lengths vary... the amount of axle extending out of the cups.
BB axle lengths have to match, to some degree, with the crankset. Too short and the crank hits the frame, too long and it may feel uncomfortable or awkward.

In addition to this site, Sheldon Brown's website has a lot of information on bike specs of all kinds.
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