Clydesdales/Athenas (200+ lb / 91+ kg) - Conti Grand Prix Tires Dry Rot??
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05-28-10, 12:16 PM
I put new tires on my bike last year....they have about 300 miles on them and i was topping off the air and noticed that where the side wall meets the tread it looks like its dry rotted similar to an old car or trailer tire. I always run these towards the upper end of the pressure, is it possible my weight is an issue at 238?
Tires are the Conti Grand Prix 4000s....Expensive.
05-28-10, 12:24 PM
No, your weight is not the problem. I've never had the problem that you are describing but I go through a set of GP 4000's every month. They don't sit around. :) It's possible that it was old before you bought it and then it sounds like it sat all winter. Was it in an unheated garage?
05-28-10, 05:47 PM
I live on the coast, and tires dry rot just from exposure to the salt air. Since you're keeping your location and other important details to yourself, there isn't much more that we can help you with.
I have the exact same problem with the same tire. I took pictures of it and tried to find someone on their website that I could send them to. No luck and I gave up. Interestingly at my local bike shop there was a bike there with the exact tire with the exact same problem. I surmise Conti had a bad batch of tires. If you have any luck getting new ones out of them please let me know. They are way too expensive to deteriorate like this.
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