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  1. #1
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    Need help with grinding/scraping noise

    Hey guys, I'm pretty new to biking so i'm not sure if this is something simple or more complex. When I ride there's a kind of scraping noise of some sort. Something is definitely rubbing on something and it causes me to slow down and stop moving. I noticed it happens when I have to ride uphill, and sometimes after I stop and have to start up again. When i flip my bike over and run the pedals everything seems fine, so kind of clueless here. I'd appreciate any help.

    Thanks

  2. #2
    Senior Member mulveyr's Avatar
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    Quote Originally Posted by gwong02 View Post
    Hey guys, I'm pretty new to biking so i'm not sure if this is something simple or more complex. When I ride there's a kind of scraping noise of some sort. Something is definitely rubbing on something and it causes me to slow down and stop moving. I noticed it happens when I have to ride uphill, and sometimes after I stop and have to start up again. When i flip my bike over and run the pedals everything seems fine, so kind of clueless here. I'd appreciate any help.

    Thanks

    You're going to have to be a heck of a lot more specific than that... Pay attention where it's coming from, and post again when you can isolate it to a particular area of the bike.
    Knows the weight of my bike to the nearest 10 pounds.

  3. #3
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    Quote Originally Posted by mulveyr View Post
    You're going to have to be a heck of a lot more specific than that... Pay attention where it's coming from, and post again when you can isolate it to a particular area of the bike.
    So I looked at it again and when I sit on the seat and try and pedal, the back tire shifts slightly to the side and starts to rub on the frame. Does it just need to be tightened? Or is it something more serious?

  4. #4
    Senior Member mulveyr's Avatar
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    Quote Originally Posted by gwong02 View Post
    So I looked at it again and when I sit on the seat and try and pedal, the back tire shifts slightly to the side and starts to rub on the frame. Does it just need to be tightened? Or is it something more serious?
    Presuming that your wheel has a quick release, it's probably too loose.

    Move the lever of the release handle back to open it. Make sure that the wheel is completed seated in the slots ( called dropouts ). Then spin the handle several times to tighten it up - while the lever is still released.

    Then move the lever back into the locked position. You should start feeling resistance when the lever is perpendicular to the frame. By the time you get it all the way into the locked position, it should be relatively difficult to close.
    Knows the weight of my bike to the nearest 10 pounds.

  5. #5
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    When you mount the wheels the bike needs to be on its "feet", both wheels on the ground. Assuming vertical dropouts, open and close the skewer making sure the axle is fully seated in the dropouts with enough tension on the skewer. If you have horizontal dropouts there could be another problem.

    Any tuning, testing, or adjusting needs to be done with the bike upright, wheels down. You need a way to turn the pedals with the wheels off the ground.

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