I am no expert but.... according to this blog, don't try to install a BBS02 on a Trek bike. BB90 (Road) BB95 (MTB) BB121 (fat bikes): Exclusively used by Trek as an integrated bottom bracket standard, BB90/95-specific bearings press directly into the frame. Cranks with a 24mm spindle and originally intended for external bottom brackets will work with this system. I am not aware of any adaptors for this standard.To sum it up avoid this standard need custom machined solution

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Will the BBSxx fit in my bike? This is a question that many of us need help in answering. The question you should be asking first is "what kind of bottom bracket does my bike have"? You need to know the answer to this in order to understand how the BBS02 or BBSHD will fit in your bike and what size motor to choose. Nex