View Poll Results: Is my disk brake rotor bent?

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  • It doesn't matter, you should have gone with Cannondale instead

    0 0%
  • most likely

    0 0%
  • probably not, but employees didn't adjust it correctly

    1 100.00%
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  1. #1
    mtbr member
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    New question here. Brand new Trek 6300 disk brake repeating rubbing sound

    I have purchased a new Trek 6300 disk bike today and when I turn the bike upside down and spin the rear wheel I can hear a repeating sound of disk brake rotor rubbing against the brake pad. Otherwise the wheel seems to spin with no wobbling left-right. The sound is not strong, however friction will stop the wheel in less than 10 seconds if I spin it manually. I am not as concerned about the rubbing as I am with the sound not being constant. Could the brake rotor be bent although new?
    Attached Thumbnails Attached Thumbnails Brand new Trek 6300 disk brake repeating rubbing sound-img_0813%7E1.jpg  

    Brand new Trek 6300 disk brake repeating rubbing sound-img_0816%7E1.jpg  


  2. #2
    mtbr member
    Reputation: mitzikatzi's Avatar
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    Sep 2008
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    A Poll

    Take back to the shop.

    Center the brakes. Google how to if your not sure.

    Check pistons aren't sticking. Again Google.

    Hold a pencil from the chain stay to the edge of the rotor. Spin wheel. See if rotor is bent. Possible. Either straighten rotor (Google can help) or take back to the shop.

    The system might be overfilled with DOT fluid.

    Remove and replace the wheel and make sure it is "centered"
    Last edited by mitzikatzi; 09-21-2012 at 08:24 PM.
    Duct tape iz like teh Force. It has a Lite side and a Dark side and it holdz the Universe together.

  3. #3
    Big Gulps, Alright!
    Reputation: Berkley's Avatar
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    May 2007
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    Probably bent. Even brand new rotors aren't perfect.

  4. #4
    mtbr member
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    Chances are it is simply that your calipers are not centered with the brake rotor. It is a simple and easy thing to fix. If you can take it back to the bike shop where they should adjust it for you for free. While there have them show you how to do it. It is a handy thing to know and like I said, it's easy to do. Enjoy the new bike. It looks really sharp.

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