Goodyear tires w/Kevlar

I put the silent armor wranglers on my 01 Ram 2500 a few years ago. I don't have a camper yet but I have hauled a lot of heavy stuff like full loads of dirt and machinery. Tires held up fine under load with 80 psi. I did loose about 1 mpg from the old tires but don't remember what they were but they were the same size.