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  1. #1
    Dirt Bomb sknhgy's Avatar
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    How to adjust shifter

    I have a Trek 820 mtb. When I'm in the lowest gear, the chain wants to come off the large rear sprocket and get into the spokes.
    How do I adjust it so it doesn't do this?
    BTW, I'm fairly adept with tools, but I'm not very familiar with working on bikes. I need instructions.
    Thanks

  2. #2
    Senior Member Steev's Avatar
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    Jul 2005
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    There are a pair of screws on the rear derailler, one labelled "H" (high) one "L" (low). Screw in the low one a quarter turn, see if it fixes it, if not screw it in another quarter turn.

  3. #3
    Senior Member capwater's Avatar
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    Dec 2004
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    Quahog, RI
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    www.parktool.com has the drill on all common adjustments.

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