Shimano External Bottom Bracket Generations Compatibility- Mtbr.com
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  1. #1
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    Shimano External Bottom Bracket Generations Compatibility

    Looking at the Shimano M8100 series crankset, but I have an older model (circa 2015) Shimano External BB that's never been used. I noticed the latest Shimano BB for XT has a smaller outer profile, but is it functionally the same as the older BB? Will the new cranksets play nice with the old BBs?

  2. #2
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    It will work fine

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