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  1. #1
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    How do I undo a undo badly bedded rotors?

    I know better but... I went for a quick lunch ride without bedding in a new pair of rotors. Now both front and back have variable braking. I tried to clean them with isopropl alcohol but it didn't help. Is there any way to unbed the rotors and start over? Is there any chance it will even out?

  2. #2
    rebmem rbtm
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    Brake power is generated by the friction material on the pads embedding into the surface of the rotor, re-bonding to the friction material still on the pads and then breaking apart or shearing. In order for this bonding/shearing to occur, the friction material must first be displaced onto the surface of the rotor. This typically happens during the first 10 – 50 stops of a brake system and is referred to as “burnishing” the rotor and pads. When a rotor is cleaned, it will need to be re-burnished again to re-deposit the friction material onto the surface.

  3. #3
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    Thanks for the quick response! Good ino. What's the best way to clean the pad material off the rotor? I heard alcohol but that didn't work.

  4. #4
    rebmem rbtm
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    Give the pads and rotors a light sanding with some fine grit sandpaper, clean them with alcohol and then re-burnish them.

  5. #5
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    Or Steel wool and isopropl alcohol
    Duct tape iz like teh Force. It has a Lite side and a Dark side and it holdz the Universe together.

  6. #6
    007
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    Why the heck do you need to clean them?? Unless you are changing to a new pad or new rotor, just keep riding them. They'll bed in properly on their own just fine. The fact that braking is variable (i assume you mean between F and R) just suggests that one set is further along in the bedding process than the other.
    Alcohol may lead nowhere, but it sure is the scenic route!

  7. #7
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    Quote Originally Posted by mitzikatzi View Post
    Or Steel wool and isopropl alcohol
    yes exactly a much better method.

  8. #8
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    How do I undo a undo badly bedded rotors?

    Quote Originally Posted by mrmrm View Post
    Thanks for the quick response! Good ino. What's the best way to clean the pad material off the rotor? I heard alcohol but that didn't work.
    Remove the rotor. Lay on a flat surface on a clean cloth. Use 800 grit emery paper and LOTS of water.
    mtbtires.com
    The trouble with common sense is it is no longer common

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