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External BB

Bible Basher BikerBible Basher Biker Posts: 811
edited February 2012 in MTB workshop & tech
I'm sure this is dealt with elsewhere but can't find anything, sorry if it's a tired question ....

In the old days, when buying a BB you had to get the right length. But new cranksets with external BB's don't seem to mention this, so how do you know if you're getting something that fits your frame/chainline?

And does the external BB mean your cranks are further apart?

thanks!
I plan to live forever ... so far, so good

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