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Thread: FSA bottom bracket

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    Default FSA bottom bracket

    My trainer bike has a standard crankset but I think I'd get more use of the cassette (11-28) with a compact. I have an old FSA MegaExo carbon crankset that is ten speed 36/50. I don't think the ten speed crank on an 11 speed drivetrain will matter. It's already confused with campy shifters and shimano chain/cassette. I need a new bottom bracket, the old FSA I've got in the drawer is Ayetalian and the Serotta isn't. I'm trying to remember the nomenclature, I think the Mega Exo BB is what I need but there seems to be way more choices.
    Weight Doper

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    Default Re: FSA bottom bracket

    FSA bb's aren't good value for money. Shimano ones won't get the FSA axle into despite been formerly "24mm".
    If you can splash the cash, get something with replaceable bearings, like Hope or similar.
    Andrea "Gattonero" Cattolico, head mechanic @Condor Cycles London


    "Caron, non ti crucciare:
    vuolsi coś colà dove si puote
    cị che si vuole, e più non dimandare"

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    Default Re: FSA bottom bracket

    Depends on the year of that carbon crank -- there are a few different "Mega-Exo" FSA BB's depending on the crank model (6000, 6200, and 9050).
    DT

    http://www.mjolnircycles.com/

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    Default Re: FSA bottom bracket

    Quote Originally Posted by bigbill View Post
    My trainer bike has a standard crankset but I think I'd get more use of the cassette (11-28) with a compact. I have an old FSA MegaExo carbon crankset that is ten speed 36/50. I don't think the ten speed crank on an 11 speed drivetrain will matter. It's already confused with campy shifters and shimano chain/cassette. I need a new bottom bracket, the old FSA I've got in the drawer is Ayetalian and the Serotta isn't. I'm trying to remember the nomenclature, I think the Mega Exo BB is what I need but there seems to be way more choices.
    They are not THAT hateful sheesh. I do not recall them being a problem on our tandem. Agreed the construction is not great. IIRC the threaded cups are made of swiss cheese so be careful and use caution when installing.

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    Default Re: FSA bottom bracket

    just make sure you apply some grease or anti-seize to the spindle/bb interface. we literally today had to use a big ass hammer on seized one that had to marinate over the weekend in penetrating oil and gentle massage therapy before bring out the big guns. not a one man job.
     

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    Default Re: FSA bottom bracket

    Here’s the best compatibility chart that I know of. The carbon cranks (SLK, K-lite) have a proprietary width between the two arms and cannot go with Shimano 24mm BB’s, but the 24mm spindle alloy cranks (Energy, Gossamer) can use 24mm Shimano BB’s based on my understanding.

    AA792B46-A890-442F-AE3A-607412D085D1.jpg
    Jon C
    Dallas TX

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    Default Re: FSA bottom bracket

    Good info. I think what I'll do is a crank swap. The Serotta in the trainer has a Record 39/53 and the Pegoretti has a 34/50. I've never liked the compact on that bike, I just can't find my happy place with the gearing, even after I changed to a 12-25. But the 50 will be nice on the trainer. I'll just pull the crank, slap on some new bearings after I clean it up, and put it on Emma. I've got a nice 12-27 in my toolbox.
    Weight Doper

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