Mountain Bike Brake Disc Warped

Standing over the bike with a paper towel on the floor under the brake spin the wheel you can see and hear where it is bent and hitting the pad. Putting a disc out of true is pretty common and can be a real annoyance. You then rotate the wheel to bring the wobble outside the brake so you can straighten just the right spot.

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Makeshift gauge the first step is to fasten a zip tie around the frame or fork and cut the end about 1 cm away so that it lines up close to the disc.

Mountain bike brake disc warped. If your brakes are rubbing it could be down to a bent rotor so here are some tips to help you identify the problem and how to go about straighten a bent rotor if that s the cause of the issue. Often but not always warped rotors can simply be bent back using a rotor truing tool like the jagwire disc brake multi tool. Let us know your hints and tips for getting rid of disc brake rub in the comments below ex professional cyclist simon richardson is here to tell you how to straighten your disc rotors so that. Identify the warped area.

With the wheels on the bike you can sometimes sight through the brake and watch the rotor come through. If the hub is mis aligned in the dropouts is a possible explanation but it wouldn t cause an on off rub like a warped rotor. Now here s the on the cheap way to do it. Rujoi bike disc brake kit aluminum front and rear caliper 160mm rotor mechanic tool free pad adjuster for road bike mountain bike by rujoi 12 99 12.

Robin weaver from mbuk magazine talks us through fixing a bent mountain disc rotor. Marking where the rotor is most untrue. Put the bike in a workstand and spin the wheel. Unless his hub has suddenly warped which is incredibly unlikely the trueness of the wheel has nothing to do with a brake disc rub.

The park tool works. Watch for side to side motion of the rotor compared to the brake pads. Mark that point mentally spin 180 degrees and bend slightly with tool repeat until straight as possible. If so you ll be able to see the rotor move left and right in relation to the brake pads and be able to stop the wheel at that point.

Find the spot where the rotor most closely approaches one pad and mark it. For this job you will need a zip tie and wire cutters and a disc truing tool or an adjustable wrench for straightening the disc. Note the section that needs truing and rotate it away from the caliper.