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  1. #1
    mtbr member
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    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?

    Thanks

  2. #2
    Two wheels are best
    Reputation: DM-SC's Avatar
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    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
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    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.
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