Wilsons Sandbox

>From: klrkaw@... >To: DSN_klr650@egroups.com, sbbob@... >Subject: [DSN_klr650] TIRE FAILURE!!! >Date: Thu, 24 Aug 2000 15:10:29 EDT > >Just got back from a wonderful trip to northwestern Canada and Alaska. Bike >ran flawless. Tires - another story. > >Sometime within the last 1,000 miles my Avon Gripster rear tire developed >three 2 1/4 inch long gashes between the knobs on near the sidewall of the >tire. The center one actually went clear through the tire and exposed the >tube. In addition to these three gashes there were two smaller ones >developing. All cuts were on the drive side of the wheel. They do not >appear >to be "slashes" and the tire still has about 1,000 miles of tread left on >it. > >I thought - hmmm novelty. Must just be mine. Then I went to see my dad, who >was on the trip with me, and noted that he had a similar set of cracks >developing on the same side of his rear tire. Not an isolated incident!! > >Has anyone else run into this issue? > >Erik. >

Yes, I just reported this same problem to the list a few days ago. My AV34 rear with 9000 miles on it had nineteen cracks on the sidewall. They started in the knobs and went around to the sidewall. The cracks were only on one side of the tire, the side that the drive chain is on. Was your gripster the 24 or AV34? Given the mileage I got out of the tire I will put another on and watch it closely for defects. I scrapped the old tire, no longer have it. Conall ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com

have these cracks in the rubber led to any actual tire failures? i would think that the strength of the tire comes mostly from the casing and not the rubber, but im not sure... dan --- racing43rd@... wrote:

> This problem with Avon Tires came up several months > ago on another list > (Transalp I think) anyway it seems to be an ongoing > problem and no one seems > to know why it happens. Someone did suggest that > hard acceleration might be > the cause but I find it hard to believe that KLRs > and Transalps would be > powerful enough to do that. > > Ed > Windsor Oh >

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a radial tire with a tube in it builds up a lot of heat, especially if it underinflated. I was taught along time ago to check your air pressure cold, ride for 30 minutes and check it again. A properly inflated tire should have a 4- 6 pound pressure rise as the tire heats up. If it rises more than that, the tire is underinflated and the internal friction is causing too much pressure rise. An overinflated tire will not heat up enough and will give a smaller increase in pressure. This could be 100% pure B.S., but it has worked for me for a long time. I run my av's at around 40 psi, sometimes less, around 36 psi. I haven't had any problems(yet), wear seems to be minimal, and the dern things make my klr feel like it is on rails. I one of 'em pops, I or my survivors, will inform the list. James in S.C. ---------- From: dan shaw[SMTP:dan_iss@...] Sent: Thursday, August 24, 2000 10:51 AM To: DSN_klr650@egroups.com Subject: Re: [DSN_klr650] TIRE FAILURE!!! have these cracks in the rubber led to any actual tire failures? i would think that the strength of the tire comes mostly from the casing and not the rubber, but im not sure... dan --- racing43rd@... wrote:

> This problem with Avon Tires came up several months > ago on another list > (Transalp I think) anyway it seems to be an ongoing > problem and no one seems > to know why it happens. Someone did suggest that > hard acceleration might be > the cause but I find it hard to believe that KLRs > and Transalps would be > powerful enough to do that. > > Ed > Windsor Oh >

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