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  1. #1
    mtbr member
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    Apr 2006
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    48

    Middle ring with two largest sprockets not possible???

    When running in the middle ring if I select one of the two largest sprockets, the chain automatically changes to the smallest ring. Why is that happening?

  2. #2
    mtbr member
    Reputation: MichauxYeti's Avatar
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    Nov 2005
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    682
    Your FD cable tension might be a bit loose. If you're using trigger shifters, does it hesitate to shift from the small to middle ring? Also check the alignment of the cage plates to the chainrings. They should be parallel.

  3. #3
    Nouveau Retrogrouch SuperModerator
    Reputation: shiggy's Avatar
    Join Date
    Dec 1998
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    47,276
    Poor chainline.
    mtbtires.com
    The trouble with common sense is it is no longer common

  4. #4
    mtbr member
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    Check the alignment and height of the front Der. The front Der normal runs parrallel to the main axis if the bike, sometimes the move a bit.

    Sometimes it needs to be just a littl off the axis to improve shifting one way or the other.

    Notice the bumps of the front der chainplates, watch what happens has you shift.

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