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  • I assumed my frame was a 5 because of its BSA bottom bracket and no PF for hollowgram cranks.

    It's probably not. I'm pretty sure all of the frames are BB30 and it most likely has an FSA threaded alloy sleeve pressed into the shell.
    It's possible to press this out and use the bb30 bearings in the frame if so. I did it to a supersix and my caad10 track has the same from stock

  • BB30 does sound like something that is not too desirable after all?

    Thanks everyone for solving this ancient mystery!

    🕵🏻‍♂️

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