i am running a bias ply tire, so i decided to air up to the "maximum" recommended psi to avoid any flat spots....that get annoying in the morning.

when i pulled the truck on sand, i noticed that on all 4 tires, the sand collected only on the center of the tread, leaving the outside "lugs" virtually untouched.

i am guessing i will get premature wear on the center lugs?
should i let out a few lbs so i leave an even footprint?

whats yer guys' situation with mud tire psi?

 

I guess you are running TSL's. The "bias bump" in the morning is just one of the perks of running an aggressive off road bias ply tire.
Can't really get around it, but you have found that are over inflated. You will wear out the centers if you keep the inflation that high. I also suspect that you are running a narrrow wheel. This baloons the tire even more , often adding to the problem.
I try to keep an almost flat pattern on my tires. I keep just enough air to keep the very outside of the leading edges from getting torn up during turns on the street. Plenty of guys use chalk accross the tread to determine pattern.
It is a balancing act. Too low, and the tires wear and steering is heavy. Too high and the center wears, but steering feels light and truck responds better.
Mine rarely sees highway use, but does once in a while and I keep my pressures pretty low, under 22 lbs.