Once A Hero
Old School Grand Master
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Looking at using an M900 XTR bottom bracket paired with M900 XTR cranks on a build, but wondered how you determine which BB length is the best to use of the 2 offered; 107mm or 113mm?
What drives the need or not for the 6mm difference?
And is the difference all on one side of the BB or shared between each side?
What drives the need or not for the 6mm difference?
And is the difference all on one side of the BB or shared between each side?
