I am just curious what pressure, I should be running at since I am now running 31s. I used run at 32 psi with the 235/70 and I tried that, but the tires felt really low and dragging when driving. I put them up to 40 and now they look a little too full. The max psi is 50, but thats obviously way to high. I just want to cut down on the trial and error. Maybe a ZR2 stock psi?