FSA Mega Exo BB question

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  • FSA Mega Exo BB question
  • Rorschach
    Member

    There are 2 different mega exo series BB’s.One for carbon chainsets (slk kforce)and one for ali (gossamer).Why does that matter you ask?The carbon chainsets have slightly wider spacing/thicker cups so if you use them on fsa ali chainsets you’ll over preload them (and have stiff turning cranks) when you tighten the cranks on.
    It took me about 4 hours of swearing to find this out 👿

    Premier Icon Nipper99
    Subscriber

    Arse. I knew deviating from sqr taper bbs would lead to trouble.

    Premier Icon Nipper99
    Subscriber

    Kona Major Jake came FSA Gossimer cranks and an FSA Mega Exo bb. The bearing cups were marked BB6000. New bb needed and lbs sell me a Mega Exo but marked with BB8060 which i was advised was just a better version of the 6000

    New bb has an additional inner metal sleeve that slides over the crank axle in addition to the sealed outertube . All fitted but the cranks seem draggey as if the inner sleeve is placing too much preload on the bearing inner races.

    Can i ditch the inner sleeve, the bb6000 didn’t have one or have i just been flogged the wrong bb.

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