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  1. #1
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    FSA SLK MegaEXO Installation Problem

    Hello, has anyone installed a integrated BB/crank such as the FSA SLK MegaEXO and have bearing binding/roughness? I had a local shop install a set and when he tightens it the problem occurs. The only way to get it to move smoothly is to back off a tad, but he says that's not normal. I've never installed this type so, I'm not sure. I also noticed he had to hammer the drive side through the BB in order to get it through...don't know if that's normal either. Any help would be appreciated.

  2. #2
    'Mizer Cats are INSANE Mentor58's Avatar
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    my .02 is that the bottom bracket needs to be faced. If the sides aren't parallel and true the bearings wouldn't be aligned properly. This could also result in a very short bearing life. I would think that any bike mechanic would know this however...

    Steve W.
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  3. #3
    Easy like Sunday morning white lobster's Avatar
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    If by "back off a tad" you mean "loosen the crank bolt a tad," then I think you're headed for trouble. The bolt that holds the left crankarm on should be tightened to spec and left there since it should have nothing to do with bearing adjustment.

    The set on my road bike is chronically a bit loose, and I haven't gotten around to fiddling with it to see about tightening it up. All in all, I'm not thrilled with the design, but maybe someone else has some experience to share about adjusting those bearings.

  4. #4
    fmw
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    Hoosier Pedaler fmw's Avatar
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    I agree with Mentor. Go get the BB shell faced.

  5. #5
    cs1
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    Quote Originally Posted by fmw
    I agree with Mentor. Go get the BB shell faced.
    I second that, get both sides faced though. MegaExo has two cups that have to be perpendicular to the center line of the crank to function smoothly. Good luck. It shouldn't cost too much and it's a one time deal.


    Tim
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    1989 Raleigh Technium, 1989 Schwinn Traveler, 1986 Specialized Rockhopper
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  6. #6
    Senior Member Nessism's Avatar
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    Mega Exo relies on rubber coated "crush washers" to help take up variations in bottom bracket shell width. These washers tend to deform over time which releases tension on the end crank arm bolt. For that reason I like Shimano's pinch bolt crank arm attachment method better; bolts will not come loose.
    Becareful buying/selling bike parts on-line. I learned the hard way. :(

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  7. #7
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    Thanks for your help guys. I appreciated it.

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