Terry I thought that the bias tires that beat you to death until they warmed up were nylon. The ones I remember were heavy truck tires and that was back in the early 70's. My dad's Cabover Freight-liner had them on it. I had not thought about those tire for a lone time.
As for tire care and after my blowout on my pickup I would say age in general is the killer. My did not have anywhere near the rated miles and had lots of tread left. I am sure the sun does not help either. Any petroleum based product has issues with sun and probably ozone. I have bought some covers for my trailer but they are still in the boxes. Oops.
Tom Marty
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