Re: Tire pressure
So two things... First, keep in mind rims have a max pressure also. You do NOT want to exceed that, unless you enjoy metal shrapnel... I've seen rims with max psi less than 80 psi...
Second, the OP is less than half the max load. I know people often disagree with this, but give me a second... Imagine your tire at max load, max psi. The angle of sidewall and size of footprint is what the tire is designed for. You want those two variables to be the same, no matter what the load. The only variable you control is the psi in the tire. Running max psi when a tire is loaded to less than half of capacity puts the tire way outside of its design spec. Your footprint on the ground is miniscule, you will wear the center of the tire extremely quickly and the available traction is greatly reduced. (assuming bias ply, radials are actually much more tolerant of higher psi when compared to load.)
So i'm curious, why do vehicle manufacturers never, EVER recommend max tire psi on the doorpost placard? Because your ride would suck, tire lifetime would be greatly reduced, and you would not have nearly as much control. But yet for some reason people think it is ok with trailer tires that are at half their max load.