Originally Posted by lariat 7.3
Whatever your tires say on the side set to max psi
The operative word there is 'MAX'. What is written right before that? Max load: xxxxlbs at 55psi max. Very few of us meet those requirements on a daily basis. I ran the tread out of the CENTER ONLY of two sets of 365/65-16 Toyos doing that.
OP, the best answer I have found for that question is that there isn't one standard number. Rim width, truck weight, what you are hauling all come in to play here. My suggestion, starting with a NEW set of tires, scrub chalk across the tread and inflate the tires. A trip around the block should net your results. If you have chalk on the outer shoulders, reduce psi. If you have no chalk, re-apply and increase psi. I run about 40~45 psi in my 315s on 16x10s with even tread wear.
I say NEW tires because worn tires may look like they are wearing evenly side to side, but a depth gauge will tell you otherwise if they were run at 'MAX PSI'.