Tire pressure on the road

[clev]

I have a new Mobile Suites with 215/75R/17.5, G114 tires. Max psi for these is 125 and with 15k pounds on the axles (weighed), I keep them at 125. I also have a tire monitoring system to keep a check on them. I've only towed the trailer 3 times since I picked it up in November, and even in these cool temperatures, the psi increases on each to almost 150 on the highway. I'm concerned that in the summer, here in south Texas, that the psi will increase even more, due to highway heat. Just how much psi will these tires sustain? I've e-mailed this concern to GY with no response. Can anyone here offer any information?

[RustyJC]

Goodyear is fully aware of the tire pressure buildup that occurs when the tires reach operating temperature after a few hours on the road. The Goodyear G114s on our Mobile Suites typically run at 143-144 PSIG (120 PSIG cold inflation pressure) with no problems whatsoever after 2-3/4 years in service.

Rusty