Thor Forums

[Beau388]

Starting with 86 psi @ 75 degrees in the rear duels with 6,000 lbs on the duals, I see 105-108 psi after an hour at 100 degrees ambient plus about an extra couple of psi on the sunny side. I usually cruise at 60 mph. The front singles start at 80 psi @ 75 psi and usually end up at 94-96 psi @ 100 degrees ambient. I start out with the dolly at 50 psi @ 75 degrees and it climbs to 61 psi on a 100 degree day. That data is based on empirical observations over the three years in South Texas. Remember it the flexing of the tire that produces the heat. The more flex the hotter the tire gets. Faster speed, more weight and lower air pressure increases the heat in a tire. The increase in air pressure is primarily a result on the heat in the tire.