I run max tire inflation, whatever is on the tire sidewall. I don't have problems with traction or uneven wear. I want the least rolling resistance= +mpg. In my Silverado the tires were rated to 80psi and that's what I put in them even though the sticker said 50. My Tundra, current vehicle the tires are rated for 35psi and that's what's in them, maybe closer to 38. I think it calls for 32psi.