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Bottom Bracket Trashed

Old 04-03-09, 07:46 PM
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dlester
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Bottom Bracket Trashed

I am not sure how 'normal' this is, but the bottom bracket on my road bike is all screwy and needs to be replaced. This is a bike that is a 1999 Trek 1200, so it didn't have incredibly good components to start with, but when I bought it new I didn't ride it much, got married, hung it up in the garage and didn't touch it until last March.

When I took it off the hook, it went to the LBS for a full tune up (yeah, I should do it myself, but I don't). I just rode it a lot last year, changed to the MTB in December, and took the road bike in for the spring tune up.

I am interested in the cumulative knowledge of the people in the forum. The RSX (I think that is Tiagra level now, maybe Sora even) wasn't high quality, but what would make it wear out after what is essentially only one season? Did all the idle time on the hook hurt it? Ideas?
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Old 04-03-09, 07:54 PM
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Idle time on the hook, and the grease hardened from the aromatic esthers leaching out of it.
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Old 04-03-09, 08:15 PM
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Hmmmm, I have a hard time believing a good grease would have died so quick. I know my bikes hung up in the garage for 3 years in heat and humidity of Florida and did not have any issues, but stranger things happen. Replace it with a higher end bracket, should run you about $30-$45 and about 30 mins of your time if you want to do it yourself. Just loosen the drive side first.
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Old 04-04-09, 07:26 AM
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Originally Posted by dlester View Post
I am not sure how 'normal' this is, but the bottom bracket on my road bike is all screwy and needs to be replaced. This is a bike that is a 1999 Trek 1200, so it didn't have incredibly good components to start with, but when I bought it new I didn't ride it much, got married, hung it up in the garage and didn't touch it until last March.

When I took it off the hook, it went to the LBS for a full tune up (yeah, I should do it myself, but I don't). I just rode it a lot last year, changed to the MTB in December, and took the road bike in for the spring tune up.

I am interested in the cumulative knowledge of the people in the forum. The RSX (I think that is Tiagra level now, maybe Sora even) wasn't high quality, but what would make it wear out after what is essentially only one season? Did all the idle time on the hook hurt it? Ideas?
That is entirely possible, grease is actually a very thick liquid, after time it will dry out, if you ride regularly bottom brackets and hubs should be rebuilt with fresh grease (and new balls) every couple of years or so. The exception here are ones with sealed cartridge bearings. Bottom brackets moved to sealed bearings a few years ago and stayed that way, hubs seem to have moved to cartridge bearings although Shimano is moving back to conventional hub bearings, at least in some hub models.

Because your bike sat for a long time, the grease in the bottom bracket dried out, this left the bearings dry, and they self destructed. You should be able to replace the BB with a cartridge model for under $50. Did you tell the shop the bike had sat for an extended period? They should have rebuilt the hubs and BB with fresh grease and new balls at the time.
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Old 04-04-09, 07:53 AM
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http://www.bikepedia.com/QuickBike/d...=brand&a1=Trek
I'm not sure which one you have, but both BB are pretty low end. It's amazing how little lube they put in these things.
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Old 04-07-09, 05:22 PM
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What kind of problems does it have?
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Old 04-07-09, 07:58 PM
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Originally Posted by B Piddy View Post
What kind of problems does it have?
It makes a lot of noise when pedaling, and you can grab the crank and rattle it back and forth much more than you should be able to do.

It is down at the LBS right now. They are replacing it, along with some other things I asked them to do. I will pick it up Thursday night and start riding again. I miss the road bike. I have been using the MTB since mid-December and it just isn't the same.
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Old 04-08-09, 03:18 AM
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Cheap stuff is junk!....We had an inexpensive tandem and after 2 rides had to upgrade the BB cartridges. My Lemond came with Bontrager junk on it, Isis BB I think. I squeezed out 7000 miles in one year. A couple months later, it was pretty much toast. Had the BB replace but he crank was still junk and the BB kept loosening. Replaced it with an inexpensive Ultegra outboard bearing setup found on an ebay online store. Much stiffer and better since. $149 including the BB on "Wheelandsprocket", well worth it!
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Old 04-08-09, 02:30 PM
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Originally Posted by Mr. Beanz View Post
Cheap stuff is junk!.... <SNIP>
+1 on what Mr. Beanz stated. My Gary Fisher Nirvana came with over all descent components. The bike as a whole has done fine for two Winters. The one thing that went bad after the 1st Winter of use was the BB. I pulled it out and it was some mystery brand made in China. I guess they figured I could not see it so they didn't even bother putting in a descent Shimano BB. I spent $38 on a higher quality Shimano BB and after the 2nd Winter everything is running perfect. No hint of problem with the BB.

Bottom backets are pretty cheap. Get a descent quality unit and it will last. Get a bargain basement price unit and be ready for regular replacements. The goofy thing is that a realy cheap BB is something like $15. I'll spend the extra $15 and have it last 4 times as long.

Happy riding,
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Old 04-11-09, 08:24 PM
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Originally Posted by curbtender View Post
http://www.bikepedia.com/QuickBike/d...=brand&a1=Trek
I'm not sure which one you have, but both BB are pretty low end. It's amazing how little lube they put in these things.
OK, this is a great site. Thanks for posting.
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