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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 06-29-07, 06:01 PM   #1
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Is This Cartridge Caput?

Oh CRAP!!! I meant CARTRIDGE, not cassette and I can't change the title of this bloody message!!!!

I’m looking into a quiet ‘low frequency rumble’ in the drivetrain of my beater ride [TREK ZX7000]. With the chain off, I hear it only when I spin the cranks fast. I can ‘feel’ a slight rumble when I hand turn the crank at all speeds. There is about a 2mm lateral back and forth ‘play’ at the ends of the cranks. [The cranks are seated snugly, BTW.]

I want to say the cartridge is worn and should be replaced, but not liable to fail altogether and leave me stranded in the scary wilds of West Virginia. Wuddayathink?

Last edited by Coyote!; 06-29-07 at 06:07 PM. Reason: Misspelling in title.
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Old 06-29-07, 06:19 PM   #2
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The bearings are shot and the cartridge should be replaced. It isn't likely to strand you but could produce an interesting ride home someday soon.
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