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#1
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Puckering of 2 Avocet 28mm tires with Kevlar belt
I've had a problem with two of the new "Carbon 12" Avocet tires (the
ones with black sidewalls). Both were the 28mm size (measuring a true 28mm) and both having a Kevlar belt. In both cases, the tread began to "pucker" on the outer edge or edges of the contact patch. In the first tire, it occured on both sides, as if two moles had dug tunnels under the rubber in parallel paths around the circumference of the tire. I don't keep track of mileage, but that tire was quite worn before the problem appeared. I ultimately retired the tire because of a sidewall cut unrelated to the puckering. The second, which was used on the front for most of its life, was not very worn when the puckering appeared (the seam at the center of the tread was still visible in spots). In this case, there was only one mole's tunnel. I retired that tire last weekend because of a hole in the casing at a point along the tunnel. I'm guessing that this is caused by the kevlar belt not being glued down to the casing underneath. When I cut a cross section, I see an air pocket with some fibers on the top. It could be that just the rubber is separating and carrying some kevlar fibers with it. Any ideas about what's going on? |
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#2
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Puckering of 2 Avocet 28mm tires with Kevlar belt
Gary Young wrote:
I've had a problem with two of the new "Carbon 12" Avocet tires (the ones with black sidewalls). Both were the 28mm size (measuring a true 28mm) and both having a Kevlar belt. In both cases, the tread began to "pucker" on the outer edge or edges of the contact patch. In the first tire, it occured on both sides, as if two moles had dug tunnels under the rubber in parallel paths around the circumference of the tire. I don't keep track of mileage, but that tire was quite worn before the problem appeared. I ultimately retired the tire because of a sidewall cut unrelated to the puckering. The second, which was used on the front for most of its life, was not very worn when the puckering appeared (the seam at the center of the tread was still visible in spots). In this case, there was only one mole's tunnel. I retired that tire last weekend because of a hole in the casing at a point along the tunnel. I'm guessing that this is caused by the kevlar belt not being glued down to the casing underneath. When I cut a cross section, I see an air pocket with some fibers on the top. It could be that just the rubber is separating and carrying some kevlar fibers with it. Any ideas about what's going on? Something wasn't assembled correctly to allow that kind o separation... or as you say something came unglued. I have had ver good results with Avocet tires, but I don't use the Kevlar belted ones I have had more problems with Kevlar belts than solutions provided b them. If you have the tire that you cut apart, why not give a call t Avocet and ask them. I would be very interested to know what the say,,,... maybe your get a free pair of tires for your trouble o shipping back the problem tires. I was about to track down a couple o pairs of these tires... without Kevlar belts; now I think I wil wait... and do some more checking around. Avocets aren't readil available in Local Bicycle Shops around here - |
#3
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Puckering of 2 Avocet 28mm tires with Kevlar belt
I've had a problem with two of the new "Carbon 12" Avocet tires (the
ones with black sidewalls). Both were the 28mm size (measuring a true 28mm) and both having a Kevlar belt. In both cases, the tread began to "pucker" on the outer edge or edges of the contact patch. In the first tire, it occured on both sides, as if two moles had dug tunnels under the rubber in parallel paths around the circumference of the tire. I don't keep track of mileage, but that tire was quite worn before the problem appeared. I ultimately retired the tire because of a sidewall cut unrelated to the puckering. The second, which was used on the front for most of its life, was not very worn when the puckering appeared (the seam at the center of the tread was still visible in spots). In this case, there was only one mole's tunnel. I retired that tire last weekend because of a hole in the casing at a point along the tunnel. I'm guessing that this is caused by the kevlar belt not being glued down to the casing underneath. When I cut a cross section, I see an air pocket with some fibers on the top. It could be that just the rubber is separating and carrying some kevlar fibers with it. Any ideas about what's going on? I don't know why it happens, but I can certainly verify that it's not the first time. I had several do that on my bike, and saw it on some others too. Mine definitely died far earlier, mile-wise, than they should have. Avocet seems intent on proving that carbon black isn't really the end-all be-all after all. I'd suggest different tires. --Mike-- Chain Reaction Bicycles http://www.ChainReactionBicycles.com |
#4
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Puckering of 2 Avocet 28mm tires with Kevlar belt
"daveornee" wrote in message .. . Gary Young wrote: I've had a problem with two of the new "Carbon 12" Avocet tires (the ones with black sidewalls). Both were the 28mm size (measuring a true 28mm) and both having a Kevlar belt. In both cases, the tread began to "pucker" on the outer edge or edges of the contact patch. In the first tire, it occured on both sides, as if two moles had dug tunnels under the rubber in parallel paths around the circumference of the tire. I don't keep track of mileage, but that tire was quite worn before the problem appeared. I ultimately retired the tire because of a sidewall cut unrelated to the puckering. The second, which was used on the front for most of its life, was not very worn when the puckering appeared (the seam at the center of the tread was still visible in spots). In this case, there was only one mole's tunnel. I retired that tire last weekend because of a hole in the casing at a point along the tunnel. I'm guessing that this is caused by the kevlar belt not being glued down to the casing underneath. When I cut a cross section, I see an air pocket with some fibers on the top. It could be that just the rubber is separating and carrying some kevlar fibers with it. Any ideas about what's going on? Something wasn't assembled correctly to allow that kind of separation... or as you say something came unglued. I have had very good results with Avocet tires, but I don't use the Kevlar belted ones. I have had more problems with Kevlar belts than solutions provided by them. If you have the tire that you cut apart, why not give a call to Avocet and ask them. I would be very interested to know what they say,,,... maybe your get a free pair of tires for your trouble of shipping back the problem tires. I was about to track down a couple of pairs of these tires... without Kevlar belts; now I think I will wait... and do some more checking around. Avocets aren't readily available in Local Bicycle Shops around here. Here are several "online" sources for Avocet tires: Sheldon Brown http://www.sheldonbrown.com/harris/tires/index.html Gaerlan (for Avocet Cross) http://www.gaerlan.com/bikeparts/par...l/wheel26.html World Class Cycles http://www.worldclasscycles.com/clincher-tires2.htm g to g tandem http://www.gtgtandems.com/parts/700r.html and others (licktons, B&L Bike Shop, etc.) Of course, your LBS can order direct.... |
#5
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Puckering of 2 Avocet 28mm tires with Kevlar belt
"bfd" wrote in message
ink.net [...] Here are several "online" sources for Avocet tires: World Class Cycles http://www.worldclasscycles.com/clincher-tires2.htm They don't carry the 28s or 32s. g to g tandem http://www.gtgtandems.com/parts/700r.html That's where I got my 32s. Rich was very helpful and at $29 each was the cheapest per unit. He also didn't charge a ridiculous handling fee for posting them to me. and others (licktons, B&L Bike Shop, etc.) Licktons have a totally bizarre policy regarding OS orders. They won't accept credit cards! They're expensive, too. -- A: Top-posters. Q: What is the most annoying thing on Usenet? |
#6
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Puckering of 2 Avocet 28mm tires with Kevlar belt
Gary Young wrote:
I'm guessing that this is caused by the kevlar belt not being glued down to the casing underneath. When I cut a cross section, I see an air pocket with some fibers on the top. It could be that just the rubber is separating and carrying some kevlar fibers with it. I wonder if anyone has experienced this on the older Avocets (pre Carbon 12) that were made in Japan. I hope Avocet's quality control isn't going down the drain. Are the Carbon 12s made by IRC as the the old Avocets were? Art Harris |
#7
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Puckering of 2 Avocet 28mm tires with Kevlar belt
"Art Harris" wrote in message
om Gary Young wrote: I'm guessing that this is caused by the kevlar belt not being glued down to the casing underneath. When I cut a cross section, I see an air pocket with some fibers on the top. It could be that just the rubber is separating and carrying some kevlar fibers with it. I wonder if anyone has experienced this on the older Avocets (pre Carbon 12) that were made in Japan. I hope Avocet's quality control isn't going down the drain. Are the Carbon 12s made by IRC as the the old Avocets were? I don't think so. The Carbon 12s are made in Sth Korea. -- A: Top-posters. Q: What is the most annoying thing on Usenet? |
#8
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Puckering of 2 Avocet 28mm tires with Kevlar belt
DRS wrote:
Are the Carbon 12s made by IRC as the the old Avocets were? I don't think so. The Carbon 12s are made in Sth Korea. IRC makes tires through a subsidiary in Korea, the Korea Inoue Kasei Co.: http://www.inoac.co.jp/en/kaigai/index.html I don't know for sure that this is where the Avocets are made, but I suspect so. I've been using the new Carbon 12 tires (25mm) since they first came out and have seen no problems. I've probably worn through about 8 of them so far, but no defects. -- terry morse Palo Alto, CA http://bike.terrymorse.com/ |
#9
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Puckering of 2 Avocet 28mm tires with Kevlar belt
"DRS" writes:
Licktons have a totally bizarre policy regarding OS orders. They won't accept credit cards! They're expensive, too. What's an OS order? Do you mean online order? You have to call them by phone as they don't have a secure server (or didn't the last time I ordered from them)- and they do take credit cards over the phone. As far as price, I have found them competitive with every mail order house, except for blowout sales at Nashbar, Performance, Colorado Cyclist or Excel. |
#10
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Puckering of 2 Avocet 28mm tires with Kevlar belt
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