Quote:
Originally Posted by CapriRacer
But that is an upgrade in several ways. To make a valid comparison, everything has to be the same except for the things that are inherent in the difference between P type tires and ST type tires - which is the question I was responding to.
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You are correct that there is essentially
no comparison to be made between ST tires and P rated radials; at least as far as use on an Airstream is concerned. You simply cannot find a P rated tire with enough load capacity to replace even a load range C tire. That's largely because of lower inflation pressure and no bonus allowance for running higher pressures. FWIW, on another forum a poster pointed out that according to an article on TireRack.com you have to decrease the load range of a P rated tire by 10% when used for trailer use. The only scenario where I can see using a P rated tire on a trailer is with something like a 4x8 utility trailer that's got 12" tires.
That's why people keep pointing out that the only valid comparison is an LT tire vs ST tire. And you can get load range C LT tires in a 15" rim size so the comparison is apples to rotten tomatos