Tire Pressure ('99 Limited w aftermarket rims/tires)

[MileHigher99]

When I bought my '99 Limited it already had aftermarket 17" rims (vs factory 16s) and 265/70R17 Cooper Discoverer A/T3 M+S 115T E tires on it.

Sticker on inside of door says 32psi for the factory 265/70R16s, but how does that translate to these 265/70R17s Es that are on it?

Tried looking on the Cooper site but it wasn't clear to me, as mine say A/T3 *and* M+S on them but their site only seems to show either or??

So honestly, Im not sure which version these are, nor what the right Tire Pressure ought to be. Anyone able to share some insights?

I've read several other Tire Pressure threads but didn't see one where the sizes
and such were the same as what I have here so Im just not sure.

Daily use includes a mix of mountains/dirt, paved streets, and highway, and I carry about 150bs of gear around at all times. Any help would be appreciated. Thanks.

 

[BlackCat914]

I keep my load range E tires at about 35psi. A lot of people say that if you keep them in the 30's you'll get uneven wear, but I've been in the car business a long time, and have had my tires at 35psi for a long time, and they're wearing perfectly fine. The truck rides horribly with anything over 40psi in them.