ok guys, this is humbling to ask, being that i worked at a tire dealership for 2 years, installing tires and doing nothing any more in depth than replacing trans and timing chains (no major overhauls). i had stock size tires on my 2000 xterra (dueler revos, great tire) and ran 35 psi in the front and 32 psi in the rear. based on the wear, these where over inflated. now i have put 32-11.50-15 kumho roadventure mt(according to tire rack reviews, folks are getting about 60k miles on these mt's, they ride great too). generally, with a wider tire, the required tire pressure is decreased even more. How much pressure are you guys running on 32-11.5's. i just cant bring myself to bring the pressure down to 28 psi like nissan says (i know some engineer got payed a lot of money to calculate this, but i do highway driving twice a week with this truck.) are you guys bringing the pressure down that low or have yall been running an increased pressure despit the tire size

Nissan "says" to run 28 or whatever, assuming the stock size/type tire.
I run my 32x11.50-15 BFG ATs at about 30 psi, and I get excellent wear (65K from my first set) but the best way to determine the ideal pressure is the "chalk test" as so:
Air the tire to a high starting pressure (maybe 35-40 psi), drive a while to get them to normal running temp, then find a nice straight stretch of pavement (a large parking lot). Stop at one end and rub chalk all across a section of the tire tread on the front and rear tires. Drive a couple hundred yards and stop. The chalk should have worn off more in the center of the tread. Drop the pressure a couple of psi, re-chalk, and repeat. Once the chalk is wearing evenly, note the pressures for the front and rear. This will be a "warm" pressure. Go home, let the tires cool, and note the pressures again. This will be the "cold" pressure to use, although I would bump it up a couple of psi to take into account cornering loads on the outer edges.

Brent

BRILLIANT!

I check it about once a month, and after every offroad trip. you never know, until it is too late, that you shoved a stick into the side wall of the spare. yes, unfortunately, mine is still on the bottom. a rear rack will come after the differential lockers.
thanks again