I'd like to replace my stock crankset with some Middleburn cranks on a 06 M4 Stumpy frame. I'm disapointed with the external BB / Stylo Cranks that came on the bike. What size square taper BB would I need to run a single ring with the Middleburn this set-up?
Mtbr's 2016 Winter Biking GearReviews and Roundups
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