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Out of round problem

Old 04-03-05, 10:02 PM
  #1  
RoboCheme
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Out of round problem

I was going downhill today and I got a flat. I immediately stopped and replaced the tube, but when I started up again I could tell that the wheel/tire was out of round (a consistent thump). When I got home, I took a close look at the wheel at there was definite bump at one spot (right at the valve stem). What do I do now, replace the tire, the wheel, the rim? No sure it's worth taking it to a LBS to true it since it's over 21 years old.

thanks for your help.
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Old 04-03-05, 10:27 PM
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Your tire is probably just not seated properly. Since the bump is at the valve, perhaps the valve is keeping the bead from seating. Deflate the tube and push the valve into the tire (remove the lock nut if you have a presta) this should help the bead seat into the rim.
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Old 04-03-05, 10:32 PM
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sch
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You may be lucky you got home. Check the tire to be sure the bead is fully seated
in the rim. It is easiest and safest to not fully seat the bead at the valve. The tube is stronger there and because of the valve less likely to herniate out and instantly
blow, which is what happens anywhere else on the tire. Deflate the tire, push the valve way up into the tire and check the full circumference of the tire to be sure the
bead is seated. Inflate to a few pounds and recheck, do this visually on both sides and then by rolling the wheel along the floor while pushing down on the tire. Then reflate to usual pressure and see if the bump is gone. Other possibilities: tire has a bulge (chunk and replace); rim is out of true (rotate wheel on bike and look at rim only as it rotates, not the tire, if it hops it may be out of true or bent. If the brake grabs on the rim at one spot it is likely a bad/damaged rim. This is not easy to do unbeknownst to you, unless you have problems with short term memory. Steve
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Old 04-03-05, 10:38 PM
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Thanks, Moose. That seems to have worked.
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Old 04-04-05, 07:27 PM
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You're welcome!
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