Thread: Using a 68mm BB in a 70mm shell- Is it possible.
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Old 12-24-06 | 06:43 PM
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operator
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Originally Posted by jacobs
Italian BB's are 73mm wide, English are 68mm. The width is arbitrary, as long as you choose the correct spindle length for the purpose. The issue is the threading. If it's Italian an English BB will probably just fall right in, and not engage the threads. It's hard to crossthread an Italian BB with an English cup.
How is the width of the BB shell arbritrary? There's also 70mm as well.
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