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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 08-11-11, 01:15 PM   #1
dude103
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lower gears making noise...

Hi everyone,

I have a GT ZuM that I have ridden with no problems for more than 9 months. However, recently the three highest gears(lowest speeds) (this bike has 8 gears) have made lots of noise, especially the highest gear (lowest speed), which doesn't work anymore. The lower 5 gears all work very well with no noise. Anyone know why? Any help would be greatly appreciated. Thanks
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Old 07-23-12, 06:07 PM   #2
temon00
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It could be your "b" angle adjustment; the jockey pulley on your derailleur may be contacting the sprockets in your higher gears causing the noise. This is a good resource for diagnosing and repairing the problem.

http://sheldonbrown.com/derailer-adjustment.html
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