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  1. #1
    mtbr member
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    May 2005
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    Bumps causing shifts

    I've been learning wrenching on my own, and after replacing my shift cables, my bike "shifts" on its own when I hit bumps. It doesn't actually change gears it just tries to until the suspension comes back to its normal position.

    Otherwise, it shifts beautifully.

    What did I do?

  2. #2
    Boyeeee
    Reputation: BCBlur's Avatar
    Join Date
    Nov 2004
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    938
    Sounds like you might not have enough housing running along your linkage.

    Try adding more housing to the piece of cable that is affected by your suspension movement.

  3. #3
    R.I.P. DogFriend
    Reputation: jeffj's Avatar
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    Jan 2004
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    Quote Originally Posted by BCBlur
    Sounds like you might not have enough housing running along your linkage.

    Try adding more housing to the piece of cable that is affected by your suspension movement.
    I agree and sometimes it is the loop that is at the back of the rear triangle that connects to the rear of the derailleur that is the one that is too short. Make sure that loop is kinda on the big side. I have seen this many times and you wouldn't necessarily think that part of the housing would be the culprit, but it is.

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