Quote:
Originally Posted by Joggernot
Remember that 6-ply light truck tires are 80 psi max sidewall. That might be what you are looking for. 4-ply are backed down closer to 50 psi max sidewall. I run 50 psi in the Toyota Tundra with no problems.
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I'm not sure what you are trying to say here, but I think it is incorrect.
The typical construction for a tire is 2 sidewall plies - typically polyester - and 2 steel belts in the tread area. This applies to passenger car tires, and LT tires, regardless of the Load Range (Ply Rating).
EXCEPTIONS:
Small passenger car tires don't need 2 plies, so you will frequently find those with a single body ply.
High speed rated tires generally have cap plies (nylon) over top of the steel belts - sometimes 1 ply, sometimes 2
Sometimes even lower speed rated tires will have cap plies - as cap plies really reinforce the tire and delay tread separations from appearing.
Sometimes LT tires will have cap plies - also for reinforcement and delay of tread separations.
I hope that clears things up.