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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 02-21-07, 06:57 PM   #1
lordconqueror
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Is my BB unusable?

Apparently I bought a crankset that has a 70mm bottom bracket with it, and I need 68mm. I guess I am going to have to find a new bottom bracket, huh?
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Old 02-21-07, 07:09 PM   #2
Rev.Chuck
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If you have a 68mm BB, then yes.
Is this a square taper?
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Old 02-21-07, 07:14 PM   #3
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No, I guess it's an Octalink.
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Old 02-21-07, 09:16 PM   #4
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The real problem may be threading, not width. Most 68 mm bottom brackets are English threaded and most 70 mm bottom brackets are Italian threaded. The two thread types are completely incompatible
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