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  1. #1
    Senior Member wheelspeed's Avatar
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    Eccentric Reassembly

    I hear a squeek/grind coming from our 2004 Trek T-2000 that we've narrowed down to coming from the front BB area. It developed during a rain ride. Well, I guess it could still be a loose chainring on the captain's cranks, or timing chain ring on the rear cranks, or a loose crank arm of the front set. But I guess I'll start with the BB bearings and eccentric.

    I plan to try disassembling the cranks and eccentric to clean and regrease. I found this: http://www.tandembicycling.com/439/t...bottom-bracket, which looks helpful.

    However, did I hear somewhere that some Teflon tape should be used when reassembling a BB or an eccentric? Not sure.

  2. #2
    Senior Member
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    Lots of ideas back here. On our bike there was a little paint in the BB housing. This caused a squeak at 12000 miles.
    I know a guy who's similar squeak turned out to be a broken frame (carbon fiber-single bike), but I really doubt that's your problem!
    I've never used teflon tape. I prefer a LIGHT coating of anti-seize, but a light coating of grease is easier to work with.
    Bushnell has an article on the list of things to grease to eliminate noises.
    Last edited by justcrankn; 05-14-11 at 07:25 AM. Reason: added link

  3. #3
    Senior Member
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    FSA recommends Teflon tape on the bottom bearing brackets, the ones that screw into the bottom bracket.

  4. #4
    Senior Member zonatandem's Avatar
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    Dec 2003
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    Tucson, AZ
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    ariZona carbon fiber tandem & single
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    Have never used teflon tape for BBs.
    However, go with manufacturer's instructions.
    Squeaks are darn hard to isolate.

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