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Bottom bracket

723 views 2 replies 2 participants last post by  jtm2227 
#1 ·
I have a 2012 trek marlin and I'm looking at upgrading a few things. I found a 2x10 sram x7 group online reasonably price but it is missing a bottom bracket. My question is what kind of bb do I need to get to make this group work on this frame? Thanks for any help folks.
 
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