Air Pressure

[redhorse]

Question for all you great minds to help the simple minded like me. Why is the recommended air presure on a tire listed as 44lbs. and when inflated to that presure, especially on a performance radial, the car is almost impossible to drive? My wife had her Nittos on her Solora rotated and balanced and of coarse they changed the air presure that I had them, which was about 30-32lbs. This evening she said that car was hard to drive on the interstate with the presure that was in the tires. Any clues or help?

[QWKSNKE]

that is MAX rating not recommended rating. Nobody should ever run a street tire at 40 psi. Its dangerous. Somebody didn't know what they were doing

Recommended tire pressure are located in your car. (on either the door jams, glovebox, etc.. Its a silver decal on most vehicles)

[Italian LX]

The recommended air pressure should be listed on the inside door sticker of your car. 44psi sounds more like a maximum pressure rating for the tire.

I usually run 32psi in all my street tires and when I had drag radials, I ran 24-28psi on the street.

[redhorse]

That is what I thought, and that is usually what I run 30-32psi. But then pray tell me why these guys, at these tire stores want to put so much air in tires?

[EZ SPEED]

But then pray tell me why these guys, at these tire stores want to put so much air in tires?

Because they are Nutsac's and dont know any better :nono:

[QWKSNKE]

Because they are Nutsac's and dont know any better :nono:


:lol:

[Sendero]

I run 65psi on a set of Nitto 555R's. They handled and hooked great! Don't believe me, ask Jugg.

[Purple1995Pony]

lower profile tires handle much better at the higher pressures on tracks and autox....not good for teh daily driving though ....especially where I live with the crappy roads

[TheJeanyus]

For hard cornering, higher pressures are necessary to cut down on sidewall flex. It does make them ride rougher and wear more toward the middle, though. I run about 26 - 28 psi in my front tires (Kuhmo Ecsta MX 275/40) and 25 psi in the rears (Nitto 555R 315/35).

[93Cobra#2771]

Now that I think about it, I need to drop the air pressure in my nitto drags, I'm running 32psi, I believe.

I actually run max pressure in my DD truck tires. Better fuel economy that way. I picked up about 1/2 mpg doing so, believe it or not.

[QWKSNKE]

yeah truck tires are a different class and are recommended to be run at a higher pressure.

Ford recommends the tires on my 250 to be run at 55-60 psi

[93Cobra#2771]

The recommended pressure on my 1500 Chevy is 42psi, I believe. I run 60psi, though. :D

[Craig K.]

I run 37 psi cold in the '95.
Better fuel economy, and get longer life out of the tires.
During the hot summer months, I will lower it back to 35 psi cold though
Generally the hot pressures are about 2-4 psi more depending on the outside temps

[QWKSNKE]

I run 37 psi cold in the '95.
Better fuel economy, and get longer life out of the tires.
During the hot summer months, I will lower it back to 35 psi cold though
Generally the hot pressures are about 2-4 psi more depending on the outside temps

If I run mine that high the centers would wear out in half the tire life. I drive to much highway speeds to be able to run any of our mustang tires that high

[Purple1995Pony]

too low a pressure can wear out the tire shoulders prematurely too.... generally anything under 30psi on todays radial tires is too low ... sidewall flex and hard cornering will do it with low pressure. I run mine at 40 psi and wear them all pretty evenly and get better mileage? wear and mpg but sacrifice a little more harsheness in the ride. I don't like the feeling of driving a boat with sidewalls flexing too much :jester:

all just a matter of personal preference too. wife doesn't like riding in my Mustangs for a very long ride (over 10-15 minutes) because of the bumpity factor

[Italian LX]

too low a pressure can wear out the tire shoulders prematurely too.... generally anything under 30psi on todays radial tires is too low ...
It must depend on the tires. If I run any more than 30psi on my drag radials, then centers wear out waaaay before the sides. I have run 18psi in drag radials for a few thousand miles and never came close to wearing the edges out. :shrug:

[Purple1995Pony]

yeah ... drag radials a totally different construction ....lower pressure works better

[Craig K.]

If I run mine that high the centers would wear out in half the tire life. I drive to much highway speeds to be able to run any of our mustang tires that high

You forget how much I drive per year (near 20k per all highway).
I have around 9k or so on the tires so far, and they seem to have worn very evenly.

Are you talking about your DR's?

[QWKSNKE]

You forget how much I drive per year (near 20k per all highway).
I have around 9k or so on the tires so far, and they seem to have worn very evenly.

Are you talking about your DR's?


Actually I was referring to any tire