I just picked up a XTR SMBB90-A BC137 bottom bracket to build up a new SC Blur LTc frame with. I've got an older set of XT 760 cranks that I'm using. Is this bb compatible with my 760 cranks? I opened up the package and the external cups look a bit small so I'm second guessing myself.
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Mtbr's 2016 Winter Biking GearReviews and Roundups
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