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frohme · Nov 7, 2005, 04:53 PM

I have a question regarding the correct tire pressure for my 2000 Mercury Mountaineer (AKA Ford Explorer). The sticker on the inside of the driver door says the correct pressure is 26psi, but that would have been of the original Firestone tires (that were recalled) The truck currently has Goodyear Wranglers RT/S and the tire says max psi of 44. The size is 235/r75/15. What should I have them inflated to?

Thanks
Scott

wzartv · Nov 7, 2005, 05:36 PM

Your best bet is to have them inflated to what the TIRE says. The label on the tire is the proper amount designed for that style and make of tire. Make sure you go by that.

Good luck!

thebriggsdude · Nov 7, 2005, 07:25 PM

Max of 44 is the way to go if that's the maximum, though anywhere in between would be all right.

fredg · Nov 8, 2005, 05:21 AM

Hi,
The tire pressure should always be adjusted to what is given on the door of the vehicle, not on the tire.
Here is a link:

http://www.enjoythedrive.com/content/?id=8748

My own replacement tires on my 2000 Towncar, (bought it used) are not the original tires. The Max on the tire itself is 44 psi. However, the sticker on the door of the car says 32 psi.
I try to keep 32 psi in the tires, when I check them.
That is also the advise given by the tire store where I bought the tires. Tires' tread lasts much longer when using the vehicles' door psi. If using more than that, the inside of the tire tread tends to wear out much faster than the outside tread. PepBoys Tire Centers also suggest the same.

wzartv · Nov 8, 2005, 01:08 PM

Hi,
The tire pressure should always be adjusted to what is given on the door of the vehicle, not on the tire.
Here is a link:

http://www.enjoythedrive.com/content/?id=8748

My own replacement tires on my 2000 Towncar, (bought it used) are not the original tires. The Max on the tire itself is 44 psi. However, the sticker on the door of the car says 32 psi.
I try to keep 32 psi in the tires, when I check them.
That is also the advise given by the tire store where I bought the tires. Tires' tread lasts much longer when using the vehicles' door psi. If using more than that, the inside of the tire tread tends to wear out much faster than the outside tread. PepBoys Tire Centers also suggest the same.

Sorry about that... I guess I have been misinformed! Thanks for clarifying that!

Good info to learn! ;)

fredg · Nov 9, 2005, 07:02 AM

Hi,
You are quite welcome, wzartv.
I have also found out that the max pressure on the tire itself is used for indicating just how much pressure can be "loaded" on the tire.
For example, with my pickup truck, if I load 4 refrigerators in the bed, then check the rear tires, I might be overloading them, pressure wise. When the tire is compressed, the air is compressed, the pressure increases. If I check the air pressure with this load, and see a pressure of 60 psi, it probably means my rear tires are going to blow, or at least separate the steel threads!
The tire manufacturers' max specs are mostly looked at to not overload with a load on the vehicle, and not necessarily the tire max pressure at normal operating conditions of the vehicle.