mbavers
Senior Member
F750 single axle, new bias ply drive tires, 1000/20, load range H (6000+ lbs each when dual). I drive 10 miles to the gravel pit empty, then 10 miles back fully loaded (maybe a bit over). I am half on paved roads, half on rough gravel roads. My max speed empty is 30-35; max speed loaded is 20-25. At max weight the manufacturer's recommended pressure is 105. My tire dealer wanted to use 80-90 psi. I had them all aired to 95-100 cold. Since I can't change the pressure between heavy and light, what pressure would you use?