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  1. #1
    mtbr member
    Join Date
    Jan 2005

    Another Avid Mech Adjustment ?

    I just installed a bb7 on the wifes bike last night and Had a question. It looked like the rotor was taller than the pads. It's a 160 rotor and the caliper is on a Black super air. It looked like the bottom of the pads were about 2mm lower than the running surface of the rotor. I shimed the caliper so the pads lined up a little better.

    Should I have shimmed the caliper or is it normal for the pad to hang over the under side of the rotor?


  2. #2
    Two wheels are best
    Reputation: DM-SC's Avatar
    Join Date
    Jan 2004
    I've never seen an Avid Mech set up where the pads were aligned with the rotor the way you described. The round Clean Sweep rotor has a braking surface that's wider the pads.

    When using a wavy or a polygon rotor, however, the pads hang down (or is that in?) more.
    Never be afraid to try something new.

    Remember amateurs built the Ark.
    Professionals built the Titanic.

  3. #3
    Nouveau Retrogrouch SuperModerator
    Reputation: shiggy's Avatar
    Join Date
    Dec 1998
    It is better to have the pads sit lower than higher - as long as the rotor clears the inside of the caliper.

    If the pads do not have full contact at the outer edge of the rotor a lip will form that could cause problems later.

    If they hang over the inside edge of the rotor they will be worn flat by the arms of the rotor.
    The trouble with common sense is it is no longer common

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