I want to use a Shimano XT external BB crankset. Do I need a Shimano BB86 bottom bracket? Isn't BB86 typically for road, so wouldn't the BB86 be too narrow for MTB cranks? Do I the use spacers that come with the XT crank to resolve this, although I don't use the XT bottom bracket? Thanks!
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Thread: BB86 on Anthem X 29er frame