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  1. #1
    johnliu@earthlink.net jyl's Avatar
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    Should We Balance Bicycle Wheels?

    I was thinking (dangerous, I know) about my bike shimmy issue. When car tires are installed, they are dynamically balanced. We don't do this for bicycle wheels. Should we? How might this be done?
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  2. #2
    Senior Member mrrabbit's Avatar
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    Should we balance our lopsided ears?

    Should we balance our asymmetrical length legs and arms?

    Hell, let's go borderline nasty here...

    Should us guys balance a certain part of our private anatomy by wearing a single ear ring in the opposing ear? Afterall, many wrestlers on TV do!

    While we're at it, someone look up photos of Lance Armstrong - see what he's got on those ear lobes...

    =8-)
    4000+ wheels built since 1984...

    Disclaimer:

    1. I do not claim to be an expert in bicycle mechanics despite my experience.
    2. I like anyone will comment in other areas.
    3. I do not own the preexisting concepts of DISH and ERD.
    4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
    5. My all time favorite book is:

    Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life

  3. #3
    Senior Member DannoXYZ's Avatar
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    Bike shimmy has nothing to do with wheel-balance. The RPMs a bike-wheel spins at and the amount of weight-imbalance isn't significant enough to cause shimmy problems. One indicator supporting this is the frequency of the shimmy and shake; notice that it's of a higher frequency than the RPM of the wheel. Wheel shake can be caused numerous things:

    - loose front and/or wheel-bearings
    - out-of-round or laterally un-true wheels
    - loose headset
    - mis-aligned fork
    - mis-aligned/bent frame
    - etc.

    Here's a good article on wheel-shimmy: Dave Moulton - Shimmy re-visited

  4. #4
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    When my car tires are out of balance they cause some shaking when I'm going over about 65 mph but not at lower speeds. I presume having my bike wheels out of balance would also cause vertical shaking above some speed - but since I never go fast enough to experience it I won't worry about it.

    Lateral shimmy is a different phenomenon and is not caused by out of balance wheels.

  5. #5
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