What are some good tire pressures for everyday driving?

 

Probably 30-32 psi.

 

30 Cold

 

Recommended at 30 PSI front and rear

 

I personally think the factory recommended pressure of 30 lbs for the rear tires is too high. I usually run around 28 lbs cold. The rearend doesn't seem to 'jump around' as much in bumpy turns, and the tire wears much more evenly. For the fronts, I go with the generals recommendations. FWIW, I got 23K miles off the original set of runcraps.

 

When all else fails, check the recommended on the driver's door.

 

Just like it says on the sticker!!

 

30lbs. cold

 

Thanks for the info. I guess I need to lower my Pressure by a pound or two.

 

What do you mean by cold.. I just checked mine and they were 36-37 psi!!!!!! I didnt drive the car all day either. Its sat since last night and its 6L15 PM EST now. I deflatted them they are all 30.. is that the right thing to do? Its been 89-94 degrees all day though, would that make the pressure higher than usual?

 

Yes, it sounds like you did the right thing. If they were 36-37 lbs and you hadn't driven it, that's entirely too much pressure. 30 lbs is more like it.

 

30 cold!

 

If you have not checked them since the weather has warmed up, the higher pressure may just be due to the temperature change. The pressures can change 1 psi for every 5 degrees change in ambient temperature. If you last checked them when it was 60 degrees outside, they could easily have gone up 6-7 psi.

I check mine all the time. It is also a good way to detect small leaks if one of the tire pressures is different from the others.

I run 33 psi in the front and 31 psi in the rear and get fairly even tire wear. (except the negative camber wear on the fronts)

 

quick AND EASY.. tires never wear while they are cold.. they do not perform at all when they are cold.. the idea is to have them at the proper temperature hot yes hot.,..now doesn't that make more sense?
Every performance group: Winston cup, formula 1 , NHRA, Sema, IHRA, etc measures the track temperature many time over the course of the day, and adjust tire pressure according to the cars set up... they test tire pressure "Hot" because the car will see Hot tire pressure while performing. You Can not tell me a Guy in Bismarck North Dakota should set his cold tire pressure to what it says on the door specially when its -27F, and the same door sticker is in the C5 that is in Arizona on a 110 F day.. Yeah I know its a dry heat, but if both guys put 30 psi in their car... one will be 25 psi soon as he is out on the road, and the other guy will see 35 when he is put on the road..
road temperatures on a 95+ day on a black top road in Georgia can reach 160 F.
OK you want the number..????
I don't let my tires get over 30psi or under 28psi and that's while they are at operating temp..
Using this method I can consistently get 43/45000 miles out of a set a tires.. and this is some aggressive driving..
the problem with cold temps specially in the summer is the heat up quickly to 35/36 psi.. and become center high the foot print diminishes you get less traction by taking an inch out of the footprint, you loose traction and the tires lose grip and you wind up erasing 30% of the tire because you don't have a even down force and your 10 in rear wheels are now 8 inches...
WOW, that wasn't quick and easy..
remember all performance crew monitor track temperature and adjust the car accordingly so Hot tire pressure is important to them .. they can get a extra few laps from tires that are set by the road temp... and also better gas mileage.. most people here that push their car see center tire wear this is because they have too much tire pressure in their car when they are hot..

 

For '99 - Volume 1-3 - section 3, page 104 -

"The Tire Placard (information label) is permanently located on the rear of the driver's door edge. The following information may be found on the Tire Placard (information label):

* The maximum vehicle load.
* The tire size.
*The COLD inflation pressure for the tire."


From GM's lips -


PS - Cold is defined as local ambient air temp.