Tire (not rim) has a hop
10-08-05, 11:59 AM
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Tire (not rim) has a hop
maybe i'm over-sensitive to this because i've been eying my newly built wheels for wobble, but i've noticed that my tires both have a 1.5mm hop in them. They are relatively cheap but tough IRC Metro kevlar belted tires with wire beads. There is a spot on each tire that rises about 1.5mm higher than the rest of the tire.. it looks like the rim has a major hop, but the rim is true.
Is this normal? The tires are almost new, and a checked to make sure they were mounted properly.
Is this normal? The tires are almost new, and a checked to make sure they were mounted properly.
10-08-05, 12:09 PM
#2
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Tube's probably pinched between the tyre and rim. Let out all most of the pressure and pull the tyre sideways so you can see down the inside edge of the time. Work your way around the entire circumference and check for the tube being caught. Pushing up on the valve-stem before inflating helps as well.
10-08-05, 12:29 PM
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^^ As i said, i checked that and it was fine. The tires are also at at least 65psi, so if the tube _was_ pinched, something dramatic would probably have happened...
10-08-05, 08:01 PM
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Does the high spot happen to be opposite the valve stem? If so, that's common. Try this:
1. Let most of the air out of the tire.
2. Push the valve stem in toward the hub.
3. Reinflate the tire.
Sometimes the tire beads get pushed up by the thick part of the tube adjacent to the valve stem. When that happens, the nice round tire is pushed so that it isn't concentric with the rim. The high spot will be exactly opposite the valve stem.
1. Let most of the air out of the tire.
2. Push the valve stem in toward the hub.
3. Reinflate the tire.
Sometimes the tire beads get pushed up by the thick part of the tube adjacent to the valve stem. When that happens, the nice round tire is pushed so that it isn't concentric with the rim. The high spot will be exactly opposite the valve stem.
10-08-05, 08:39 PM
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I think you should either stop measuring your tires with a micrometer and just ride the blasted thing, or else go out and buy better tires.
10-08-05, 08:52 PM
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Originally Posted by Dave Stohler
I think you should either stop measuring your tires with a micrometer and just ride the blasted thing, or else go out and buy better tires.
Heh.. probably good advice.
10-08-05, 09:35 PM
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Originally Posted by Retro Grouch
Does the high spot happen to be opposite the valve stem? If so, that's common. Try this:
1. Let most of the air out of the tire.
2. Push the valve stem in toward the hub.
3. Reinflate the tire.
Sometimes the tire beads get pushed up by the thick part of the tube adjacent to the valve stem. When that happens, the nice round tire is pushed so that it isn't concentric with the rim. The high spot will be exactly opposite the valve stem.
1. Let most of the air out of the tire.
2. Push the valve stem in toward the hub.
3. Reinflate the tire.
Sometimes the tire beads get pushed up by the thick part of the tube adjacent to the valve stem. When that happens, the nice round tire is pushed so that it isn't concentric with the rim. The high spot will be exactly opposite the valve stem.
10-08-05, 11:02 PM
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Originally Posted by robo
maybe i'm over-sensitive to this because i've been eying my newly built wheels for wobble, but i've noticed that my tires both have a 1.5mm hop in them. They are relatively cheap but tough IRC Metro kevlar belted tires with wire beads. There is a spot on each tire that rises about 1.5mm higher than the rest of the tire.. it looks like the rim has a major hop, but the rim is true.
Is this normal? The tires are almost new, and a checked to make sure they were mounted properly.
Is this normal? The tires are almost new, and a checked to make sure they were mounted properly.
