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front wheel noise: hub/ ball bearings?

Old 08-18-13, 08:03 PM
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front wheel noise: hub/ ball bearings?

I just noticed my front wheel was making a noise that was sort of like a rattle: Shoop, shoop...more like those old hula hoops with the sand in them?
It sounded like it was the front wheel but when I stopped in at an LBS the guy said the wheels were perfect!
They're American Classics (campy witheels and hub).
I thought it could be sound from the hub/ball bearings coming through the frame.I've gone over some bumpy roads, potholes...and I had a minor fall last week (and it did fall on the left side).
Does this description of the sound make any sense to anyone? and if so, does anyone know of what I speak?
I REALLY hope this doesn't mean costly repairs...sigh!
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Old 08-18-13, 08:46 PM
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Take the wheel off the bike and spin it in your hands. If it makes the noise when turning slowly, but not when turning faster it may be sand in the hula hoop, or more specifically bits of debris in the rim falling as the rim turns.

OTOH, if you feel grabbing or torque on the axle then something may be wrong with the hub.

Lastly, if you don't have any issues off the bike, and it only makes noise when mounted, then it might be as simple as the rim rubbing the brake shoe at some point. This may be the most likely scenario after a fall which might have bent the rim ever so slightly.
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Old 08-19-13, 10:44 AM
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Originally Posted by FBinNY View Post
Take the wheel off the bike and spin it in your hands. If it makes the noise when turning slowly, but not when turning faster it may be sand in the hula hoop, or more specifically bits of debris in the rim falling as the rim turns.
I have a rear Mavic CXP33 rim that has a piece of debris inside. The rattling drives me nuts when the wheel is turned slowly on the repair stand or while lubing the chain but I never hear it on the road.
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Old 08-19-13, 10:48 AM
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Originally Posted by HillRider View Post
I have a rear Mavic CXP33 rim that has a piece of debris inside. The rattling drives me nuts when the wheel is turned slowly on the repair stand or while lubing the chain but I never hear it on the road.
Yes, like the amusement park spinning disc, once the turning wheel is spinning fast enough it holds debris firmly pressed against the inside of the outer wall and becomes silent. The needed speed for this is pretty low.
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