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  1. #1
    Senior Member
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    Oct 2004
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    Austin
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    Marin Verona road bike, Cannondale F300
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    My 10-year-old mountain bike (Gary Fisher Tassajara) would occasionally jump a gear, especially during heavy stomping, so I bought a new chain. I also thoroughly cleaned the front and rear derailleurs, the front chain rings and rear cassette. The bike sounds a lot quieter now and in casual riding it works well enough. But on a long ride tonight (Austin's trail of lights), there were several frustrating moments when I wanted to accelerate hard and suddenly the rear derailleur popped a gear. grrrr...

    I haven't looked at the bike closely since but before the ride the alignment of the rear derailleur looked correct and, as I said, the drivetrain noise was very minimal.

    Is my rear cassette shot?

    Thanks in advance

  2. #2
    Wood Licker Maelstrom's Avatar
    Join Date
    Apr 2002
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    Whistler,BC
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    Transition Dirtbag, Kona Roast 2002 and specialized BMX
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    You changed everything BUT the cassette? Thats your problem this time.

  3. #3
    The Rabbi seely's Avatar
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    Apr 2004
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    Is your derailleur hanger bent? You should really always replace the cassette and the chain at the same time as they do wear together.

  4. #4
    Campy or bust :p cryogenic's Avatar
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    Oct 2004
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    Knoxville, TN
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    Surly Karate Monkey commuter build
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    bent derailleur hangers can definitely cause such things... wouldn't surprise me if it was slightly out of line... I've never crashed mine and mine was barely bent causing sluggish shifting. Turns out my bike had fallen over and landed on that side once when my cats knocked it over. Re-aligning the hanger fixed the problem.

  5. #5
    Senior Member
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    You can check your cable tension, see if it is too lose or too tight works for me.

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