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Old 01-12-10, 08:05 PM   #1
BikeToWork
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How to True a Disk Brake Rotor

Does anyone have a good technique for doing this? I tighten the calipers to the point where they rub the rotor then bend the disk away from the rubbing caliper with a small crescent wrench. While this works to a certain point, I can never get it really true. There must be a better way of doing it.
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Old 01-12-10, 08:26 PM   #2
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there's no better way to true rotors. if the rotor is bended 1~2 spots, you can easily true it, but if it is like wave shape, you need a rotor truing gauge to true perfectly.
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Old 01-12-10, 08:28 PM   #3
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I take the rotor off the wheel and place it on a hard flat surface. In my case a formica bench top. I then mark the rotor where it needs to be bent and put it (wraped in cloth) in a vice and gently tug on it with my hands. I do this until the rotor lies flat.
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Old 01-12-10, 08:45 PM   #4
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Quote:
Originally Posted by BikeToWork View Post
Does anyone have a good technique for doing this? I tighten the calipers to the point where they rub the rotor then bend the disk away from the rubbing caliper with a small crescent wrench. While this works to a certain point, I can never get it really true. There must be a better way of doing it.
Note that you should bend rotors at the "arms", not at the circumference. That does nothing.
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