What causes a tire to do this?
#1
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What causes a tire to do this?
Hello there.
I was riding the other day and noticed what felt like a light thumping on my rear tire. I rode again tonight and noticed that the wheel was dragging at one spot when I was walking the bike along the hallway. I thought it was a brake pad rubbing on an out of true wheel but it wasn't that. It's a side-to-side deflection on the tire. Here are two images of it. ANy idea as to what would cause this?
Any and all help is greatly appreciated.
Thanks and cheers
I was riding the other day and noticed what felt like a light thumping on my rear tire. I rode again tonight and noticed that the wheel was dragging at one spot when I was walking the bike along the hallway. I thought it was a brake pad rubbing on an out of true wheel but it wasn't that. It's a side-to-side deflection on the tire. Here are two images of it. ANy idea as to what would cause this?
Any and all help is greatly appreciated.
Thanks and cheers
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#4
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Yes sirs. I know the tire is toast. I'll be cutting it in half before tossing it. I do that to all scrap tires so that some unsuspecting person doesn't try to use it. We used to taco damaged wheels at one of the shops I worked at and we also cut damaged tires so they couldn't be used. There are a surprising number of people who scavenge the garbage at bicycle shops in the hope that they'll find something useful. Unfortunately many of those scavengers don't know what to look for to be sure an item is safe to use. I figure if it's in the garbage it's there for a pretty good reason.
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I work in the electronics industry and do the same thing with bad cables, cut off the ends or crush the connectors. It is surprising how many times people will take something out of the trash and try to put it back to use; it never seems to occur to them that it is there for a reason.
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I work in the electronics industry and do the same thing with bad cables, cut off the ends or crush the connectors. It is surprising how many times people will take something out of the trash and try to put it back to use; it never seems to occur to them that it is there for a reason.
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I call this tire affliction "the dreaded S-bulge". Happened to me once at mile 80 of a century on relatively new tires. Made it the final 20 miles and finished with the cords starting to show.
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yes, the cords in the casing have broken / sheared off. Early Grand Bois tires which were very nice would develop a bulge after about 500 miles.
Mark Petry
Bainbridge Island, WA USA
Mark Petry
Bainbridge Island, WA USA
#9
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I work in the electronics industry and do the same thing with bad cables, cut off the ends or crush the connectors. It is surprising how many times people will take something out of the trash and try to put it back to use; it never seems to occur to them that it is there for a reason.
Last edited by KraneXL; 11-01-19 at 01:00 AM.
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I've had the same thing happen with Performance Forte tires that were virtually brand new. There were the cheapest tires I could buy at the time and I guess they proved it.
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I have a brand new Vittoria tubular with the same problem
It's my spare.
It's my spare.
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I work in the electronics industry and do the same thing with bad cables, cut off the ends or crush the connectors. It is surprising how many times people will take something out of the trash and try to put it back to use; it never seems to occur to them that it is there for a reason.
#14
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I wasn't going to comment. I'm a life long, hard core, dumpster diver. What I can't get my head around is the notion that somebody would retrieve a lump of discarded technology knowing they weren't competent to evaluate or repair it, then consider paying a tech to do that for them. That's like going to an insurance auction for "total loss" vehicles, then paying a mechanic to bring it back from the dead.
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I wasn't going to comment. I'm a life long, hard core, dumpster diver. What I can't get my head around is the notion that somebody would retrieve a lump of discarded technology knowing they weren't competent to evaluate or repair it, then consider paying a tech to do that for them. That's like going to an insurance auction for "total loss" vehicles, then paying a mechanic to bring it back from the dead.
#16
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That is my experience with friends who went to police auctions to buy their bikes. Very popular in the '70s. They'd bring them to me or to the shop I worked at and were shocked to learn what it would take to make them right. My favorite was the Falcon road bike with a fork whose steerer was held to the fork crown by one blob of braze at the front; nothing for about 300 degrees of arc around the rest of the bottom of the steerer.
#17
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In automotive tires thats whats known as a “broken belt”. Damage is usually the result of a hard, offset impact.
In bike tires there is typically one, thin belt and this may also be the result of an in-service impact, or even damaged initially when it was installed (folded, twisted, creased, stretched, mis-stored etc.) and now thats its gotten quite thin, the symptom is allowed to exhibit itself.
In any event, broken belt or not that tire is certainly used up and due if not overdue for replacement.
In bike tires there is typically one, thin belt and this may also be the result of an in-service impact, or even damaged initially when it was installed (folded, twisted, creased, stretched, mis-stored etc.) and now thats its gotten quite thin, the symptom is allowed to exhibit itself.
In any event, broken belt or not that tire is certainly used up and due if not overdue for replacement.
#18
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That is my experience with friends who went to police auctions to buy their bikes. Very popular in the '70s. They'd bring them to me or to the shop I worked at and were shocked to learn what it would take to make them right. My favorite was the Falcon road bike with a fork whose steerer was held to the fork crown by one blob of braze at the front; nothing for about 300 degrees of arc around the rest of the bottom of the steerer.
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Well Joe and Ronsonic,
I have been to more auctions in a university setting than I wish to recall, and I sometimes live in a junkyard world, but I still can find a bargain or two. Last week it was a wheel that needed four spokes to be reconstructed, into a usable item. What you decide to retrieve is up to you but a knowledgeable purchase works quite well. I think that a good eye in dumpster diving, and junk yard scrounging, can work to your favor. Smiles, MH
I have been to more auctions in a university setting than I wish to recall, and I sometimes live in a junkyard world, but I still can find a bargain or two. Last week it was a wheel that needed four spokes to be reconstructed, into a usable item. What you decide to retrieve is up to you but a knowledgeable purchase works quite well. I think that a good eye in dumpster diving, and junk yard scrounging, can work to your favor. Smiles, MH