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farewell

What are the differences between the BB71 and BB91 bottom brackets?

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chez_jay in reply to @farewell

90% sure it is just spec level, Ultegra/XT v Dura Ace/XTR

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Brommers in reply to @chez_jay

Yep, supposedly the 91 has 'better' bearings, but how and to what extent they're better I don't think anyone knows. Except maybe Mr Shimano.
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farewell in reply to @chez_jay

Thanks.

I’ve just seen there is a BB72, how does that compare with the BB71?

EDIT - BB72 / BB92 are the mtb versions?

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