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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 06-14-06, 07:07 PM   #1
adamlaw
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Rattling my cage!

I am helping my son try to adjust the front derailler of his "new" used bike. Gearing:Shimano Ultegra 9, crankset 53/39, rear cassette 27/12. When on the large front to small rear the lateral side of the derailler cage rattles the outer part of the chain. When I adjust the outer derailer screw by undoing it any further the chain falls off laterrally when I try to shift from front small to front large (something I do when not on the small rear cog). I have read about trimming and can't seem to get it to work. Is there some other adjustment I can make to stop this irritating rattling? Is this an intrinsic problem with this set up - this seems counterproductive to me.

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Old 06-14-06, 07:35 PM   #2
AndrewP
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http://www.parktool.com/repair/byregion.asp?catid=53

The instructions in here should be followed exactly from beginning to end. It could be cable tension, or height of shifter on the seat tube - sorry I cant give a specific answer.
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