I had a set of 35x12.5x16 Mickey Thompson MTXs on my 2nd Gen, "D" tire with max pressure on the sidewall of 50 psi. Ran them at 40 psi except when off-road conditions dictated them to be aired down. I traded the truck with 68k on the tires and still had usable life on them.

Current tires are 35x12.5x17 Dick Cepek FCIIs also a "D" tire with max of 50 psi, I run them at the same 40 psi. With about 32k on them they are just beginning to show a little wear and with the exception of the tire that was sitting on a bad tie rod end that is worn just a little off, they are very even.

Now these are high end (expensive) tires and most report a longer than average life with them, but still, for a pretty aggressive A/T and an A/T - M/T hybrid, this kind of longevity is excellent.

MAYBE with an "E" tire I might come down a bit off the 75% mark to soften the ride a little as an "E" tire can be a bit harsh, but I wouldn't come down a whole lot.

Again, let the 75-80% be a starting point and adjust for ride comfort, even wear and fuel economy from that point...


As I stated, an "E" tire is a stiff sidewalled tire, if you bring it all the way up from 35 psi to 60 you'll probably feel like your truck just became a 1 ton. I'd go to 50 psi and see what that does for you. Then adjust from there. If you find better fuel economy (and you should) and the ride ain't bad, then try 60 psi...