Results 1 to 6 of 6
  1. #1
    mtbr member
    Join Date
    Apr 2013

    Shimano XT Disc Brakes Rotor Noise

    I realigned the caliper early today, and for some odd reason I hear rubbing on the rotor. When spinning the while stationary, the wheel spins freely with no rubbing. If I ride and stop pedaling and listen to the rear caliper, that's when I hear it. Is there a reason for this?

    I removed the brake pads and reset the pistons with a screw driver wrapped in tape so the pistons don't get damaged. Also, how does a piston get damaged? I hear people saying not to use screw drivers to push the piston in. Both pistons move when I squeeze the brakes so it seems fine to me. I don't put the entire screw driver in and push... I just put the screwdriver in enough where I can push the center of the piston in. Maybe I'm doing it wrong? Any help would be much appreciated. I'm just confused with this rubbing sound.

  2. #2
    mtbr member
    Join Date
    Apr 2013

  3. #3
    mtbr member
    Reputation: jkirkpatri's Avatar
    Join Date
    Sep 2008
    Try the brake forum! Front or rear? I'm guessing flex from the chainstays/fork.

  4. #4
    mtbr member
    Join Date
    Sep 2012
    When I installed my xt brakes I had to realign the caliper several times before they were quiet. I found that if you over tighten the caliper mounting bolts that it would actually move the caliper out of alignment. Best advice is to loosen the bolts just enough to allow movement, squeeze the brake lever hard, "lightly" tighten both bolts, and then go over them once more then release the lever. While I find these to be the best brakes I have ever had on a bike, I also find them to be noisy at times where my previous set (tektro drako) were quiet all the time. I don't mind the trade off though because they just work so well. Every time I wash the bike or go through water on the trail they get loud until I do a few good stops. Also, if they are new, be sure to "bed" the pads by going out and getting some speed up and doing several hard stops to heat them up. When I first installed my xt setup (203mm front/180mm rear) I thought there was something wrong with them or they were not bled properly but after searching this forum, others informed me of the bedding procedure and it worked like a charm. Good Luck!

  5. #5
    Here, diagonally!
    Reputation: JACKL's Avatar
    Join Date
    Sep 2011
    For resetting the pistons, I use a tire lever.

    Also, I don't center the rotor by squeezing the brake lever; I manually do it. You need to be able to see light between the rotor and pads to do it this way, and you need to do it for both ends of the pads. If it is done right, when you squeeze the brake, the rotor won't move at all where it meets the pads on either side.

    I'm not sure why yours is not doing it on the stand, but is on the trail. Did you remove or reinstall your wheel between setting the caliper and riding? If so, that might do it. A sticky piston could do that as well. But first I'd make absolutely certain that you have both ends of the pads centered on the rotor.

  6. #6
    El Gato Malo
    Join Date
    Mar 2009
    Pistons are ceramic and a sharp object (bladed screwdriver) can chip/crack them or the screwdriver can slip and damage the seals.

Similar Threads

  1. Avid 185mm Rotor on Shimano Brakes?
    By Lindahl in forum Brake Time
    Replies: 14
    Last Post: 08-23-2013, 03:11 AM
  2. Replies: 2
    Last Post: 04-11-2013, 05:51 AM
  3. Difference between these shimano XTR disc brakes?
    By myersv in forum Beginner's Corner
    Replies: 1
    Last Post: 07-11-2012, 10:56 PM
  4. Shimano XT Disc Brake Noise
    By brownrl in forum General Discussion
    Replies: 2
    Last Post: 03-19-2012, 10:01 AM
  5. Replies: 9
    Last Post: 11-02-2011, 10:53 PM

Members who have read this thread: 0

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts



VISIT US AT and the ConsumerReview Network are business units of Invenda Corporation

(C) Copyright 1996-2018. All Rights Reserved.