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Old 05-13-11, 10:59 AM   #1
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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:, which looks helpful.

However, did I hear somewhere that some Teflon tape should be used when reassembling a BB or an eccentric? Not sure.
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Old 05-13-11, 10:40 PM   #2
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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
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Old 05-14-11, 11:58 AM   #3
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FSA recommends Teflon tape on the bottom bearing brackets, the ones that screw into the bottom bracket.
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Old 05-14-11, 05:43 PM   #4
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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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