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  1. #1
    mtbr member
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    Apr 2005
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    66

    Stripped drive side BB threads

    A buddy has a FSR with e-type front d. and his tapered spindle BB threads in the frame are pulled out. Is there a sleave or oversized cup that can be installed. Can you TIG in some material and re-tap the threads? What about using an external bearing crank?

    Thanks

  2. #2
    mtbr member
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    May 2008
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    A very tricky predicament you have there. If the BB shell wall is about 5+mm thick, then it may be possible to retap it to the larger diameter Italian BB threading.

    Since Italian threaded BBs are opposite threaded to British BBs, you will need to use loctite to secure it into place otherwise it will unscrew during a long ride (which can be annoying if you don't carry tools around with you).

    For outboard bearing cranksets like the Shimano Hollowtech 2 system, it is possible to use a British threaded bearing cup on one side and an Italian threaded cup on the other, the plastic BB sleeve is optional.

    The metal sleeve BB shell insert has merit, but it won't work very well (trust me, I've tried it). There just isn't enough contact area and material around the shell to provide a strong enough bond.

  3. #3
    OTTer
    Reputation: psych's Avatar
    Join Date
    Nov 2007
    Posts
    46
    It may be possible to have the shell re-threaded. Theres a place in england does it for 65 & they cant be the only ones. http://www.argoscycles.com/www/renovation-pricelist.htm

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