275 70R18 Tire Question

OK, a long time ago, back in 2013, the RAM 2500's used to have a "Light Load" option. What this allowed an owner to do was run the pressure at 60F, 45R when there was no load, and the TPM would not go off. Then under regular use, you needed 60F and 70R. I have a 3500, I find that my tires wear well with regular 7500 mile rotations at 60F and 55R. The fronts wear more on the shoulder, the rears wear more on the center. With rotation, you get an even wear. Whenever I haul a load of pavers or sand, etc... then it's 80psi rear, front stays at 60psi.

I stay around 70 front and 75 rear, all the time in my 2500. My Nitto Dura Grapplers are a little softer than the stock Firestone's were. Seemed to wear pretty evenly like that.

I'm running at 65 most of the time. I find that wet traction is awful if I run them higher than that when unloaded. GMC 2500hd crew sb Duramax z71 suspension.