Originally Posted by Blue Goose
You need to go by the tire rating verses the door label unless they match. When I got my new Toyo m/t's the shop had them set at 80 front and back and I thought I was going to wreck at any moment over 35mph so I kept dropping the pressure till it drove right unloaded and then I checked it loaded and settled on 45psi all the way around. But thats just me.
I've went buy tire PSI rating all my life, till these new nitto dura grappers at 80 lbs. per tire whats on them, they will not sit correct and run correct thats so much air, and 10 plys that the rear tires only the middle would touch the road the outside inch or so of each tire was not even wearing, thats why the door sticker calls for 60 psi in the rears not enough weight to sit the tires proper.The door sticker calls for 75 in the front due to motor weight , at 80 psi were not sitting correct I,ve found happy spot of 75 psi in the front seen to be wearing correctly now. 68 to 72 psi in my rears.