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Old 03-03-12, 09:26 AM
Mr. Beanz
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Join Date: Dec 2005
Location: Upland Ca
Posts: 19,896

Bikes: Lemond Chambery/Cannondale R-900/Trek 8000 MTB/Burley Duet tandem

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I had a stock BB that lasted about 10,000 miles on my Lemond. It was replaced by the shop but loosened after 500 miles or so. It was tightened by the same mop head but once again came loose after another 500 miles.

It worked loose once again afer another 500 miles. Took it to a mechanic I trusted. He said there was nothing wrong with it, that the mop head mechanic did not readjust the BB properly when I took it in for service (cranked down super hard on one side and did not touch the other). I did however replace the entire crank and BB with an Ultegra outboard set up and never looked back.

The mop head did tell lme at installation that it might work loosen after a few miles and to bring it back for readjustment. I just thought he woud have done a good job at the adjustment but didn't.

So yeah, they can work loose after installation and can need adjustment.

The BB in my Lemond was TruVativ, $1000 bike, I neve did like it. Never was smooth so I was happy to replace it.

Last edited by Mr. Beanz; 03-03-12 at 09:36 AM.
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