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Front Brake Rubbing

tmgtmg Posts: 651
edited January 2008 in MTB workshop & tech
Have a set of Avid Ultimates on my bike. Front brake is doing my head in. It's seems to be rubbing, when you spin the wheel it just stops after a few rotations. So today I took the brake off and the wheel spins freely, so obv the brake. Took the rotor off to see if that was warped but it's straight and true, so whilst the brake was off I pushed the pistons all the way back in, stuck the brake back on, centred the rotor in the calipers and it did the same thing when you push the wheel round, Totally frustrated with it and don't know what else to do other than LBS. Any help appreciated

Posts

  • BikedevilBikedevil Posts: 1,156
    Try tweaking the centering by eye rather than just the squeeze lever method, may also benefit from reseting the pistons using a flathead screwdriver
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  • tmgtmg Posts: 651
    I reset the pistons before putting it back on, then centered the caliper by not tightening the bolts all the way and squeezing the lever, rotor looks centered by eye also
  • nicklousenicklouse Posts: 50,675 Lives Here
    did you roll the bike with the brake just applied? it will help set it. then just use it and it will settle.
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  • tmgtmg Posts: 651
    Yep I took it for a quick ride and still same problem, been like this for a few weeks and like you thought they would just bed in but havn't
  • xcracerxcracer Posts: 298
    What is the disc rubbing on? If it is rubbing on the mount then you may need to get the mount faced.
  • tmgtmg Posts: 651
    Not rubbing on the mount, the brake was OK, had issue with the seal which was fixed by Avid, put brake back on and it has rubbed ever since, thought they would bed in but haven't
  • The Big CheeseThe Big Cheese Posts: 8,651 Forum Tart 2010
    I had the same problem with my front brake also - Avis Juicy Carbons.

    It drove me mad and at high speed it would whine and make the most hideous sound.

    In the end I loosened off the caliper bolts - pulled the lever the centre them and readjusted.

    No problems since..

    a common problem with avid brakes...
  • tmgtmg Posts: 651
    How loose did you have the bolts? I've tried just that to centre the rotor but problem was still there in that the wheel wouldn't spin freely
  • The Big CheeseThe Big Cheese Posts: 8,651 Forum Tart 2010
    Quite loose - well loose enough for the caliper to freely move to the crrect position around the rotor - not too loose though
  • tmgtmg Posts: 651
    will loosen them off more than I did yesterday and see if that works
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