I have 275 70 18 E rated Michelin LTX A/T 2 really love them but looking to figure out lower air pressure for smoother ride without premature wearing and what would be a safe maximum pressure that would help mileage without wearing out the middle tread. I realize that more pressure will impact the smoother ride. As a side note also thinking about replacing leveling kit with Rancho Quick Lift Shocks and springs. They are supposed to give more travel which should be smoother and eliminate that clanking when going over bumps from the spacers. Any feedback would be great guys.