stripit wrote:
I also have the H rater 125 psi tires on my rig. With the weights I'm carrying on those tires I really need 105 psi to carry safely. At 105 starting out pressure in the Az heat my TST system will show the tires end up at about 132 psi. So as an experiment the next day of travel I increased the pressure to 110 psi start out and they climbed up to 132 ish. Next time we moved I tried 115 psi start and they climbed to 132 ish. I did one final test at 115 psi and again 132 ish So these tires like to run on my rig at the 132 area and temps depending on the outside temps hovered about 20 degrees over ambient. On a hot Az day the outside can hit 112 so the tires are running in the 135 to 140 degree range, but that isn't the normal here. Normally 20 over whatever the temps are.
Interesting numbers Stripit. I was wondering or thinking is a better term on how the pressures would change as you described.
chevman
