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  1. #1
    mtbr member
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    Join Date
    Jul 2006
    Posts
    17

    rear disc brake problem, assitance please

    I have avid juicy 7s. on my rear wheel the disc is really hanging up/dragging ( on the pads)

    this is what i have done and observed. made sure the pads are in okay and the pistons are returning ( ok) I have the wheel properly in the drops outs.

    I loosend both the caliper mounting brackets and the adjustment screws, and with the bike in the stand i have peddled the bike to observe what occures as the disc rotates thru the caliper/pads. I can see the whole brake assembly move or wobble. My conclusion is something ( the disc) appears out of alignment. If so how do i get it true.

    Also. the looser the brake assembly, the more freely the wheel spins. but as i snug up the mounting bolts or the adjustment bolts the drag increases.

    Thoughts and suggestions are most welcome. thanks

  2. #2
    mtbr member
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    Join Date
    Mar 2007
    Posts
    76
    Your rotor probably needs to be straightened. The reason it has less drag when the bolts are loose is because the caliper is moving along following the bend in the rotor. Park makes a tool for this http://www.parktool.com/products/det...t=14&item=DT-2 but I don't have any experience with it.
    [08 Ibis Mojo Carbon]

  3. #3
    ride hard take risks
    Reputation: dogonfr's Avatar
    Join Date
    Jan 2005
    Posts
    25,412
    Disc truing.

    http://www.utahmountainbiking.com/fix/index.htm

    Also be sure you dont have excess fluid after truing the rotor.
    Formotion Products
    http://www.formot

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