Tire pressure

I've been running 40 PSI cold on my stock sized Load C BFG's.

It gets up to about 44 PSI after driving for a while, they seem to be wearing fairly evenly.


*Edit* That's on 17x8.5 rim's

 

A good test for correct tire pressure is the Chalk Test - draw a chalk line across the tire, then drive it a little. At the correct tire pressure, all of the chalk should rub off evenly. If you have some left behind on the edges for example, then the tire pressure is too high and the tire is only riding in the center of the tire, and not straight across on the edges. Slowly reduce tire pressure until you get even wear across the entire width of the tire. It's old school, but it works.

My Toyota dealer likes to put 40 PSI in just about all their trucks. I ran 38 PSI on my FJ with C Rated Tires.

 

I run 38 psi in LT285s. Used to run 44 psi, but was noticing excessive center wear and rougher ride, so backed it down. Run 18 psi off-road for better ride and grip.

 

I ran the same on my 285 Toyo AT3's (C). That's what the calculator recommended as well. They're wearing well so far.