Shimano Cassette Installation Problem

Discussion in 'Cycling Equipment' started by jim.egan, Jun 15, 2004.

  1. jim.egan

    jim.egan New Member

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    Just purchased a climbing cassette for my 9spd ultrega set up. Installed the cassette on a set of wheels I've used for a long time but the gears seem to vibrate and are not smooth when pedalling. Has anyone experienced similar problems? What was the solution?

    Wheels: mavic cosmos
    Ultegra throughout.
    New cassette: 12X27
     
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  2. daveornee

    daveornee New Member

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    Is the cassette tight on the cassette body?
    Are all the required spacers in place?

    Sometimes, even with all the required spacers, due to manufacturing toleralances, it may need an additional spacer.
    You need to look and feel for a proper fit.
     
  3. txbuckeye

    txbuckeye New Member

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    Is the vibration/grinding in all gears or only on the 25 or 27 cog? If it's on the 25 or 27 you might check to make sure the chain is long enough that it's not maxing out the deraillure.
     
  4. jim.egan

    jim.egan New Member

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    It vibrates less on the 25 and 27 than the bigger gears, but there's still a noticable vibration. And the cassette is definitely on tightly enough. I've isolated the problem to this cassette, having put on my other cassette on the same wheel as a test.
     
  5. boudreaux

    boudreaux New Member

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    Same cogs? There is always the chance of a defective casette,but when going to bigger cogs,you have to have correct chain length and proper adjustment of the B tension screw.
     
  6. jim.egan

    jim.egan New Member

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    But then wouldn't the vibration only occur when on the cogs that are larger? In my case, the vibration is actually more pronounced in the cogs that match the cogs in my regular cassette.
     
  7. jim.egan

    jim.egan New Member

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    I've read that the old chain might have worn down in parrallel with the original cassette. But I've only had the combination for about two years, 5 months of that I didn't even ride due to an injury. I guess it's possible that the old chain doesn't like the new cogs. But I would have thought that would take much longer to happen.
     
  8. DiabloScott

    DiabloScott New Member

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    Some cassettes are extemely picky about chain stretch - as little as 0.5% elongation but you usually get skipping rather than noise.
     
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