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How Many Flats per Tire?

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How Many Flats per Tire?

Old 04-28-13, 01:08 PM
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How Many Flats per Tire?

Unhappy to report my third flat rear tire in six month of fairly heavy riding; happy to report it was my first while miles from home, and the repair went smoothly and almost pleasantly on the side of the road.

The tire's been punctured thrice now, all within a six inch, nearly straight line near the center line. No blow outs, just punctures. At what point does one take a tire out of service suspecting future failure do to multiple punctures....or do you? It'd be nice to replace it with the front and buy a new front, but if I can safely run more tread off of it, well, I'm cheap! The tube is starting to look like the Beverly Hillbillie truck's tires, but it's replaced and my worries are concerning the integrity of the tire after repeated puntures in one area. Thanks in advance!
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Old 04-28-13, 01:13 PM
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It isn't the number of punctures that counts, but the overall condition of the tire. If the tire is sound, with no glass cuts, or other cuts of the cord, no bulges or twists ride it until it wears through, or you feel the thinness of tread rubber is making it more vulnerable to new punctures.

Punctures are a fact of life and depend mostly on where you live and ride, and less so on the condition of the tire.
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Old 04-28-13, 01:45 PM
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The most critical part of flat repair is diagnosis of the cause. The apparent cause would be a road hazard, as the occurred on the portion of the tire directly exposed to the road at all times, but you have not said whether you found an object that caused the puncture, or at least evidence of it at the site.

When you repair a flat it is very important to keep the tube in the same relation to the tire and rim as when it was mounted, so that once you locate the puncture on the tube you can focus on that area on the tire or rim. combining the location and appearance of the puncture allows one to determine the cause as well as possible means of prevention.

So, as an example:
If you found a thorn, a staple and a small piece of glass as causes for the respective flats it would indicate that you should possibly consider a new tire, and if the tire is not terribly worn then it's also advisable to get a Kevlar belted tire for additional protection.

On the other hand if you did not find a road hazard perhaps it remained in the tire to cause the additional punctures. If you just slightly moved the tire when remounting, or if the punctures were close to the valve area and you inadvertently rotated the tire 180 degrees you would see more puncture near to the original

Also, in the first example the punctures would most likely look different from each other; in the second example they would tend to look similar.
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Old 04-29-13, 04:24 AM
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How heavy is "heavy riding"? 200-300 miles a week? Then I would suspect your tire is worn. 100 miles/week? It's getting there but should still be OK. It also depends on the type of tire.

You can be "cheap", but at some point you'll start getting more frequent flats. When I was younger and before we had this thing called the inter-webs, I didn't know any better and I'd get flats all the time. I neither pumped my tires sufficiently nor replaced them when worn until they failed completely. I don't get flats now on the road as I now do both. We also have better tires.
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Old 04-29-13, 07:02 AM
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Originally Posted by FBinNY
It isn't the number of punctures that counts, but the overall condition of the tire. If the tire is sound, with no glass cuts, or other cuts of the cord, no bulges or twists ride it until it wears through, or you feel the thinness of tread rubber is making it more vulnerable to new punctures.

Punctures are a fact of life and depend mostly on where you live and ride, and less so on the condition of the tire.
Agree. As long as no bulges or serious cuts in the cords that compromise the tire's structure, and the tread the isn't worn to the point the cords are showing, it's good. I ride my rear tire till the cords start to show. I see no increased incidence of flatting with worn tires. I always run the best/newest tire on the front.
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Old 04-29-13, 07:28 AM
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I have had tires that have gotten more puncture prone as they've worn. Schwalbe Ultremos to be exact.
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Old 04-29-13, 04:07 PM
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Just to present a more clear picture, I ride 100-140 miles per week. The tires are Bontrager LT3 26 x 2.0 always inflated to the max of 60lbs checked daily. There are probably 2000 miles on the tires, with (of course) the rear showing significant wear, though no cords visible. There's still some tread left, moreso to the outer edges. The tires seem to be much lighter in construction than I would expect in say, a commuter or comfort tire.

The last flat, I'm supposing, happened when crossing some limestone spilled from a driveway onto the asphalt roadway. I heard the "ping" that is often heard when a stone is compressed into a tire then suddenly launched from underneath. I rolled to a deflated stop within feet. No objects felt inside the tire, so a new tube was installed roadside. The flat tube was patched at home and had a tiny hole.

I really am thinking that these tires are aimed at high performance mountain biking, and may be less than ideal for commuting/roading, especially when worn. My first bike, and original equipment, so a more appropriate pavement tire will probably be in the works soon. Whaddaya think: stay with 26x2.0 or down to 26x1.5? Either way gotta have the 80 psi models, at least.
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Old 04-29-13, 04:13 PM
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Originally Posted by North Coast Joe
Just to present a more clear picture, I ride 100-140 miles per week. The tires are Bontrager LT3 26 x 2.0 always inflated to the max of 60lbs checked daily. There are probably 2000 miles on the tires, with (of course) the rear showing significant wear, though no cords visible. There's still some tread left, moreso to the outer edges. The tires seem to be much lighter in construction than I would expect in say, a commuter or comfort tire.

The last flat, I'm supposing, happened when crossing some limestone spilled from a driveway onto the asphalt roadway. I heard the "ping" that is often heard when a stone is compressed into a tire then suddenly launched from underneath. I rolled to a deflated stop within feet. No objects felt inside the tire, so a new tube was installed roadside. The flat tube was patched at home and had a tiny hole.

I really am thinking that these tires are aimed at high performance mountain biking, and may be less than ideal for commuting/roading, especially when worn. My first bike, and original equipment, so a more appropriate pavement tire will probably be in the works soon. Whaddaya think: stay with 26x2.0 or down to 26x1.5? Either way gotta have the 80 psi models, at least.
Yep, sounds like some more suitable tires are warranted. Not necessarily due to wear just suitable for your roads.
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