Tire pressure for 275/80R22.5 LR H tires

mikestock wrote:
I'm sure this has been a topic many times in the Class A forum. I have been searching for quite some time but can't find a recommendation, even in the manual. Running 6-275/80R22.5 load range H tires and know the max psi recommendation is 120 psi. I am coming from a heavy 37' fiver with load range E tires and always ran them at the 80 psi max.

I just purchased 6 new Continental tires and the installer recommended running them at the max, 120 psi, but this guy has more experience with commercial trucks than RV's. They are mounted on a 40' Phaeton with no unusual loading. I had them set at 105 psi but would like some input from others with experience in load range H tires.

As said over and over again, at least weigh each axle and use the tire inflation chart for your size. I always add 15 - 20psi for all the variables and can't see how one could remain anywhere near correct throughout their trip without doing so.
Having said that and as an added note, modern tires on some of these older coaches have a max psi rating that far exceeds the wheel rim max and would consider that dangerous, pumping them up to max. and above the wheel psi rating.