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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 05-21-06, 10:12 AM   #1
m50DX
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Odd crank noise

I own a 4 week old raleigh M50DX with 130 miles on it. Iam having a squeky, ginding noise coming from the left crank when i pedel, if i tighten it it will go away but only for a short amount of time. What can i do to fix this? Thanks
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Old 05-21-06, 12:52 PM   #2
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Just had the same problem with my bike. LBS found that the bottom bracket wasn't tightened down properly at the factory and was working loose. If I had waited instead of bringing it in immediately I would have ruined it. Get it checked.
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Old 05-21-06, 04:11 PM   #3
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My Trek was doing the same thing yesterday. The left pedal had developed a quiet "creeeeek" that was getting progressively louder. I was going to stop at the bike shop on my way to work to have it looked at because nothing appeared to be loose, and I thought something needed some lube. Well, halfway there the left pedal and... umm, "arm" part of the crank started getting really wobbly. Me, the genius who doesn't carry tools, had to just pray that I made it to the shop before something fell off. Well, I didn't. The left pedal and crank arm fell off, and I had to flag a police officer down to give me a ride.

The shop put everything back together, torqued it down and applied loctite. They said that might work, but if it was going to break again it would probably do so in the next week. At that point they would have to warranty the bottom bracket and crank. I really don't know what the problem was. I was in a big hurry to get back to work, and didn't really have time to ask questions.
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