Rear Derailleur Adjustment

Discussion in 'Cycling Equipment' started by RobertLee, Feb 6, 2006.

  1. RobertLee

    RobertLee Guest

    I installed a new cassette and chain. But I can't make the rear
    derailleur adjustment required for clean shifting. If I tighten the
    cable, I can't shift from the largest cog to the next-to-largest cog..
    But if I loosen the cable, I can't shift from the smallest cog to the
    next-to-smallest cog.

    I have a Shimano 105 rear derailleur and a Shimano 12/28 cogset on
    a 1992 aluminum Trek 1440.

  2. Nate Knutson

    Nate Knutson Guest

    You didn't mention whether the new chain is technically compatible with
    the cassette, but assuming it is and that there are no other
    compatibility issues, the main possible causes for this are limit screw
    misadjustment, cable friction, derailer pivot slop, and derailer hanger
    misalignment. The most likely limit screw problem is that your high
    screw is too far out.