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#11
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Continental Ultra Sport tires
On Thursday, September 20, 2018 at 5:25:55 AM UTC-7, Theodore Heise wrote:
Is it possible for the bead to not be fully seated without showing as a difference in the tire seam/markings' distance from the rim? -- Ted Heise West Lafayette, IN, USA Probably not. I can see no way that this marking could be showing correctly and the tire so far out of round except for the wheel being so. |
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#12
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Continental Ultra Sport tires
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#13
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Continental Ultra Sport tires
Theodore Heise wrote:
Except as I said brefore, the wheel/rim is pretty much perfectly round. If the tire/rim specifications are in agreement, sounds like some wierd manufacturing mismatch. I don't think you, or anyone else, would make the same unidentified mistake over and over! Did you try another tire with the same specification? If you then have the same situation, maybe the specifications aren't in agreement after all? -- underground experts united http://user.it.uu.se/~embe8573 |
#14
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Continental Ultra Sport tires
On Fri, 21 Sep 2018 20:12:19 +0200,
Emanuel Berg wrote: Theodore Heise wrote: Except as I said brefore, the wheel/rim is pretty much perfectly round. If the tire/rim specifications are in agreement, sounds like some wierd manufacturing mismatch. I don't think you, or anyone else, would make the same unidentified mistake over and over! Did you try another tire with the same specification? If you then have the same situation, maybe the specifications aren't in agreement after all? I don't know how I would go about checking specifications, but do intend to try one (or more) of these questionable tires on some other rims. Unfortunately, it may be a week or more before I get time to do so. -- Ted Heise West Lafayette, IN, USA |
#15
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Continental Ultra Sport tires
On Wed, 19 Sep 2018 01:40:46 +0000 (UTC), Theodore Heise
wrote: Any suggestions are welcome. What's your rim strip? I was a long-time Velox user until just this summer when I switched over to FSA rim strips which are much thinner. They make more room for the beads of the tires, rsulting in easier installation and easier seating, especially with the tighter beads on foldable tires. |
#16
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Continental Ultra Sport tires
On 9/21/2018 2:34 PM, Theodore Heise wrote:
On Fri, 21 Sep 2018 20:12:19 +0200, Emanuel Berg wrote: Theodore Heise wrote: Except as I said brefore, the wheel/rim is pretty much perfectly round. If the tire/rim specifications are in agreement, sounds like some wierd manufacturing mismatch. I don't think you, or anyone else, would make the same unidentified mistake over and over! Did you try another tire with the same specification? If you then have the same situation, maybe the specifications aren't in agreement after all? I don't know how I would go about checking specifications, but do intend to try one (or more) of these questionable tires on some other rims. Unfortunately, it may be a week or more before I get time to do so. You might be interested in this article: https://www.sheldonbrown.com/rim-sizing.html I went through this not long ago, dealing with an unusual wheel and tire size. I will say, measuring the effective diameter of the bead seat on a rim is harder than one might think. -- - Frank Krygowski |
#17
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Continental Ultra Sport tires
On 9/21/2018 2:40 PM, Tim McNamara wrote:
On Wed, 19 Sep 2018 01:40:46 +0000 (UTC), Theodore Heise wrote: Any suggestions are welcome. What's your rim strip? I was a long-time Velox user until just this summer when I switched over to FSA rim strips which are much thinner. They make more room for the beads of the tires, rsulting in easier installation and easier seating, especially with the tighter beads on foldable tires. I still use 1/2" adhesive tape on a lot of rims. I started doing it the factory original rim tape caused three flats in one day during a bike tour, and adhesive tape was the only thing available. But it worked so well that I've used it many times since. It is thin, and surprisingly strong. -- - Frank Krygowski |
#18
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Continental Ultra Sport tires
On Fri, 21 Sep 2018 18:05:17 -0400,
Frank Krygowski wrote: On 9/21/2018 2:40 PM, Tim McNamara wrote: On Wed, 19 Sep 2018 01:40:46 +0000 (UTC), Theodore Heise wrote: Any suggestions are welcome. What's your rim strip? I was a long-time Velox user until just this summer when I switched over to FSA rim strips which are much thinner. They make more room for the beads of the tires, rsulting in easier installation and easier seating, especially with the tighter beads on foldable tires. Interesting question. The (Ritchey) wheels came with a yellow plastic rim strip, and a year or so ago I replaced it with basic Velox. I'm not sure I got the right width, but in any case it seems to ride just a bit high on the edges. I can see how this might be a contributor. I still use 1/2" adhesive tape on a lot of rims. I started doing it the factory original rim tape caused three flats in one day during a bike tour, and adhesive tape was the only thing available. But it worked so well that I've used it many times since. It is thin, and surprisingly strong. Interesting thought. I'll file this one away for consideration in the future. -- Ted Heise West Lafayette, IN, USA |
#19
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Continental Ultra Sport tires
On Fri, 21 Sep 2018 18:02:13 -0400,
Frank Krygowski wrote: On 9/21/2018 2:34 PM, Theodore Heise wrote: On Fri, 21 Sep 2018 20:12:19 +0200, Emanuel Berg wrote: Theodore Heise wrote: Except as I said brefore, the wheel/rim is pretty much perfectly round. If the tire/rim specifications are in agreement, sounds like some wierd manufacturing mismatch. I don't think you, or anyone else, would make the same unidentified mistake over and over! Did you try another tire with the same specification? If you then have the same situation, maybe the specifications aren't in agreement after all? I don't know how I would go about checking specifications, but do intend to try one (or more) of these questionable tires on some other rims. Unfortunately, it may be a week or more before I get time to do so. You might be interested in this article: https://www.sheldonbrown.com/rim-sizing.html I went through this not long ago, dealing with an unusual wheel and tire size. I will say, measuring the effective diameter of the bead seat on a rim is harder than one might think. Marked for future reading. I'll check all this out as soon as I get a bit of spare time--maybe next weekend. Thanks all for the suggestions! -- Ted Heise West Lafayette, IN, USA |
#20
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Continental Ultra Sport tires
On 9/22/2018 4:56 PM, Theodore Heise wrote:
On Fri, 21 Sep 2018 18:05:17 -0400, Frank Krygowski wrote: On 9/21/2018 2:40 PM, Tim McNamara wrote: On Wed, 19 Sep 2018 01:40:46 +0000 (UTC), Theodore Heise wrote: Any suggestions are welcome. What's your rim strip? I was a long-time Velox user until just this summer when I switched over to FSA rim strips which are much thinner. They make more room for the beads of the tires, rsulting in easier installation and easier seating, especially with the tighter beads on foldable tires. Interesting question. The (Ritchey) wheels came with a yellow plastic rim strip, and a year or so ago I replaced it with basic Velox. I'm not sure I got the right width, but in any case it seems to ride just a bit high on the edges. I can see how this might be a contributor. I still use 1/2" adhesive tape on a lot of rims. I started doing it the factory original rim tape caused three flats in one day during a bike tour, and adhesive tape was the only thing available. But it worked so well that I've used it many times since. It is thin, and surprisingly strong. Interesting thought. I'll file this one away for consideration in the future. Mystery solved. Your tire's inner diameter at the bead is the same size as your rim at the painted line he http://www.yellowjersey.org/photosfr...st/rimpins.jpg Any occlusion such as a fat rim liner can (and in your case probably did) wreck that very precise fit. Sadly, many infamous brands/models of rim have an inadequate difference between the center well depth and the bead seat diameter, making tire changes painfully difficult. More, some have large badly placed nipple holes so close to the bead seat that covering them is virtually impossible without covering the tire seat area. With luck, yours is not among them. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
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