Thanks to all I have the 37-597 tires on my Schwinn now. However I noticed on the rear wheel, a portion of the tire gets "oblonged" when properly inflated. I take the tire and tube off, put the wheel on a truing stand, and the wheel itself is "pretty true". So this means it's NOT the wheel. I put back the tube/tire back on, inflate, and I get the same "non- roundness" on the tire. I see the tire fluctuate to 1/4"-3/8" from roundness when observing it with a guide. It's almost as if the tire "goes further" in this part of the wheel". This is near the valve.
To explain it a different way, if one looks at the wheel and tire as 2 concentric circles, with the wheel being the inner circle, one would expect the their two circumferences to be equidistant throughout, correct? Well in my case, the outter circle goes "non-uniform" in one part; hence the circumferences are non-equidistant in that part.
Thanks to all I have the 37-597 tires on my Schwinn now. However I noticed on the rear wheel, a portion of the tire gets "oblonged" when properly inflated.
You mention that the problem area is near the valve which makes me suspect that perhaps that portion of the tube is getting pinched under the bead of the tire. That prevents the bead from seating properly in the rim and therefore results in the tire sitting out farther in that area.
Before inflating the tube you should push in on the valve to make sure that it freely goes into the interior of the tire and isn't being hung up under the bead.
Thanks to all I have the 37-597 tires on my Schwinn now. However I noticed on the rear wheel, a portion of the tire gets "oblonged" when properly inflated.
You mention that the problem area is near the valve which makes me suspect that perhaps that portion of the tube is getting pinched under the bead of the tire. That prevents the bead from seating properly in the rim and therefore results in the tire sitting out farther in that area.
Before inflating the tube you should push in on the valve to make sure that it freely goes into the interior of the tire and isn't being hung up under the bead.
Peter's description is pretty close.
IIRC, getting tires to seat properly on the old S-6 rims was pretty easy with Schwinn-brand tires but a hit-or-miss proposition with off-brand tires. There's a couple hints for correcting this at http://www.bikewebsite.com/bike-tiretube.htm
Seating may very well be the issue, but keep in mind, that sometimes you can get amazingly [censored] tires, especially those "vintage" sizes. I've run into a couple situations, one very similar to yours, where I was about to true the wheel vertically, something which I *hate* doing (as I suck at it) only to see after careful observation, that it was a poorly manufactured tire doing the bobbing.
Thanks to all I have the 37-597 tires on my Schwinn now. However I noticed on the rear wheel, a portion of the tire gets "oblonged" when properly inflated. I take the tire and tube off, put the wheel on a truing stand, and the wheel itself is "pretty true". So this means it's NOT the wheel. I put back the tube/tire back on, inflate, and I get the same "non- roundness" on the tire. I see the tire fluctuate to 1/4"-3/8" from roundness when observing it with a guide. It's almost as if the tire "goes further" in this part of the wheel". This is near the valve.
To explain it a different way, if one looks at the wheel and tire as 2 concentric circles, with the wheel being the inner circle, one would expect the their two circumferences to be equidistant throughout, correct? Well in my case, the outter circle goes "non-uniform" in one part; hence the circumferences are non-equidistant in that part.
I'm not sure why, but I've had some problems getting tires to seat evenly on some rims. I've used a bit of liquid soap and temporary over pressure to persuade things to go on straight.
Thanks to all I have the 37-597 tires on my Schwinn now. However I noticed on the rear wheel, a portion of the tire gets "oblonged" when properly inflated. I take the tire and tube off, put the wheel on a truing stand, and the wheel itself is "pretty true". So this means it's NOT the wheel. I put back the tube/tire back on, inflate, and I get the same "non- roundness" on the tire. I see the tire fluctuate to 1/4"-3/8" from roundness when observing it with a guide. It's almost as if the tire "goes further" in this part of the wheel". This is near the valve.
To explain it a different way, if one looks at the wheel and tire as 2 concentric circles, with the wheel being the inner circle, one would expect the their two circumferences to be equidistant throughout, correct? Well in my case, the outter circle goes "non-uniform" in one part; hence the circumferences are non-equidistant in that part.
I'm not sure why, but I've had some problems getting tires to seat evenly on some rims. I've used a bit of liquid soap and temporary over pressure to persuade things to go on straight.
Dear Peter,
Sometimes the stupid sidewalls just stick against the rim.
Soap and over-pressure help, but can be hard to come by in the field.
Another trick is to inflate the stubborn tire lightly and then use both thumbs to push in repeatedly where the sidewall is playing coy. The sidewall will often lose its shyness and emerge.
Thanks to all I have the 37-597 tires on my Schwinn now. However I noticed on the rear wheel, a portion of the tire gets "oblonged" when properly inflated. I take the tire and tube off, put the wheel on a truing stand, and the wheel itself is "pretty true". So this means it's NOT the wheel. I put back the tube/tire back on, inflate, and I get the same "non- roundness" on the tire. I see the tire fluctuate to 1/4"-3/8" from roundness when observing it with a guide. It's almost as if the tire "goes further" in this part of the wheel". This is near the valve.
To explain it a different way, if one looks at the wheel and tire as 2 concentric circles, with the wheel being the inner circle, one would expect the their two circumferences to be equidistant throughout, correct? Well in my case, the outter circle goes "non-uniform" in one part; hence the circumferences are non-equidistant in that part.
I'm not sure why, but I've had some problems getting tires to seat evenly on some rims. I've used a bit of liquid soap and temporary over pressure to persuade things to go on straight.
Dear Peter,
Sometimes the stupid sidewalls just stick against the rim.
Soap and over-pressure help, but can be hard to come by in the field.
No, but you needn't have a tire perfectly mounted to get home.
Quoted message said:
Another trick is to inflate the stubborn tire lightly and then use both thumbs to push in repeatedly where the sidewall is playing coy. The sidewall will often lose its shyness and emerge.
Perhaps, but I can attest to some that have stubbornly resisted that (the default) method of seating tires.
Thanks to all I have the 37-597 tires on my Schwinn now. However I noticed on the rear wheel, a portion of the tire gets "oblonged" when properly inflated. I take the tire and tube off, put the wheel on a truing stand, and the wheel itself is "pretty true". So this means it's NOT the wheel. I put back the tube/tire back on, inflate, and I get the same "non- roundness" on the tire. I see the tire fluctuate to 1/4"-3/8" from roundness when observing it with a guide. It's almost as if the tire "goes further" in this part of the wheel". This is near the valve.
To explain it a different way, if one looks at the wheel and tire as 2 concentric circles, with the wheel being the inner circle, one would expect the their two circumferences to be equidistant throughout, correct? Well in my case, the outter circle goes "non-uniform" in one part; hence the circumferences are non-equidistant in that part.
I'm not sure why, but I've had some problems getting tires to seat evenly on some rims. I've used a bit of liquid soap and temporary over pressure to persuade things to go on straight.
Dear Peter,
Sometimes the stupid sidewalls just stick against the rim.
Soap and over-pressure help, but can be hard to come by in the field.
Another trick is to inflate the stubborn tire lightly and then use both thumbs to push in repeatedly where the sidewall is playing coy.
I like to use the palms of my hands as I hate sore "tire thumbs". ;-)
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Quoted message said:
Peter Cole said:
Zilla said:
Thanks to all I have the 37-597 tires on my Schwinn now. However I noticed on the rear wheel, a portion of the tire gets "oblonged" when properly inflated. I take the tire and tube off, put the wheel on a truing stand, and the wheel itself is "pretty true". So this means it's NOT the wheel. I put back the tube/tire back on, inflate, and I get the same "non- roundness" on the tire. I see the tire fluctuate to 1/4"-3/8" from roundness when observing it with a guide. It's almost as if the tire "goes further" in this part of the wheel". This is near the valve.
To explain it a different way, if one looks at the wheel and tire as 2 concentric circles, with the wheel being the inner circle, one would expect the their two circumferences to be equidistant throughout, correct? Well in my case, the outter circle goes "non-uniform" in one part; hence the circumferences are non-equidistant in that part.
I'm not sure why, but I've had some problems getting tires to seat evenly on some rims. I've used a bit of liquid soap and temporary over pressure to persuade things to go on straight.
Dear Peter,
Sometimes the stupid sidewalls just stick against the rim.
Soap and over-pressure help, but can be hard to come by in the field.
Another trick is to inflate the stubborn tire lightly and then use both thumbs to push in repeatedly where the sidewall is playing coy. The sidewall will often lose its shyness and emerge.
Cheers,
Carl Fogel
I tried this last night to no avail. I'll try the overinflate method.
