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Discussion Starter · #1 ·
I want to replace the crank on my Trek XO 1 with a Dura Ace crank, but can't find which bottom bracket spec is used on this frame. I am guessing bb86, but don't want to order anything before I can confirm that. I'll try Trek tomorrow, but thought I would check if anyone here knows today.

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You know, you may want to check with Trek. I was just checking out their site and someone mentioned the XO uses BB83, so double check. Their road stuff uses BB90 and I assumed the cross stuff did as well, since they invented the BB90.
 
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