another tire psi question

[vms305]

truck says 60 in front 55 in rear ok no big deal. I ran the tires like this and the fronts are wear on the inside and the outside but looks like the middle is higher then outsides. Tire always looks flat..

The tires are AT's that i had gotten about 9 months ago. there max load to psi is (80)..

what should i put them at..


Is there a difference betweek the rear rims and front rims. I see one was stamped front that was on the rear?

[Stroking the oilfield]

Run the psi the manufacture has stamped on the tire.

[Norad]

I like to run my tires at about three quarters of the max cold tire pressure that the tire company suggests. In your case and my case I would say that 60psi is a good pressure. If you are goal ot haul a heavy load you might want to add a little more air to your rear tires

[4everlearning]

Ok here is what any tire guy worth a dump, will tell you. As long as your tires are wearing evenly across then you are running them at the perfect air pressure. Now with that being said the manufacturer says to run your fronts at about 5lbs higher then the rears because it helps to prevent cupping. This has alot to do with the weight of the engine and the way the caster/camber has the tires riding on the road. Sometimes you can bump them up a few pounds in order to get better fuel milleage but you will probably start wearing your tires out in the centers if you do this. The tire manufacturers only put a max tire pressure on there because if you run them higher then that then you are taking a chance on blowing the tire. Another thing is that if you run the tire too low you run a chance on heating the sidewalls up and that can cause seperation and yet again a blowout. so back to the beggining. If you are wearing your tires out evenly then you are running the correct tire pressure. If you are planning on hauling a large load then bump them up accordingly but with load range E tires (10 ply) then do not go above 80 psi. with load range D (8 ply) then do not go above 55 psi. I believe it is.

[quequeg37]

i've always as a rule of thumb, with 10 ply ran 60 front and back and 65 in rear with load. i have even tire wear.

[elibenson]

I think the door stickers are written in such a way that they will apply to any tire of the size written on the sticker. Different manufacturers might have slightly different PSI ratings for their tires, but they will physically work and be safe with Ford's recommendations. Although, for your particular tires, it may not be the best from the standpoint of tread life.

I always fill mine according to what is written on the tires.

You are unlikely to blow a tire from being a few pounds over pressure (possibly cause poor wear though). A few pounds under pressure will cause the sidewalls to heat up and deteriorate (and cause wear problems too).

[psd_va]

the factory recommend psi for the tires are for max towing you don't always need to run those pressures all the time cause it will affet your ride and tire wear

[elibenson]

Originally Posted by psd_va

the factory recommend psi for the tires are for max towing you don't always need to run those pressures all the time cause it will affet your ride and tire wear

While that is true, I don't really feel like changing my tire pressure every other day. I just leave it at the max, and forget it.

[psd_va]

Originally Posted by elibenson

While that is true, I don't really feel like changing my tire pressure every other day. I just leave it at the max, and forget it.

True and there is anything wrong with that but for the people like me that don't tow often its not a bad idea to lower you pressures

[elibenson]

Good point. If I were not constantly changing my weight, I would definitely try to find the sweet spot for pressure vs. weight.