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Discussion Starter · #1 ·
I'm looking to replace my 3x XT's with some 2x XO's. There seems to be 2 options.. GXP, or BB30. I am new to building these bikes, so any help would be appreciated.

I've typically only bought stock bikes.

I really don't know what either mean, and I'm having a hard time finding anything on the Niner website to tell me which type of BB this takes. I've tried searching, but not finding what I need.

Thanks in advance for any help.
 
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