1bdvet

I know this is brought up again, but have base 2005 Coupe, door stickers says 30PSI front and rear.
Last week had new tires installed, this time non run flats. The tech put the tire pressure at 35 PSI, I lowered it till 30 PSI.
I just had aligned Saturday, and checked the tire pressure on the DIC, and it read 35 PSI. This morning checked them again, and they aired them up again to 35 PSI must be the magic number.

What forum members running on there non run flat tires.

richhoff

The 30 lbs it says on the door jamb sticker.

AORoads

jrose7004

30 psi cold.

Sabre34

30 psi

Corvette_Ed

RocketDawg

30 psi is the way to go.

I'm beginning to think there must be a law that garages and dealerships over pressurize your tires. I have a Subaru Forester that I get serviced at the dealer and every time they proudly say "we put the tires at 35 all the way around". But the door placard says something totally different. Not sure what their motivation is. Maybe it's to make your tires wear out prematurely.

jaredtxrx

It seems whever I have new tires put on it's a gamble what my tires PSI will be at. I've gotten them back anywhere form 20-45psi and never are all 4 the same psi. At least 1 is usually correct though. :p

Scuba Ghost

30 PSI just like the door jamb sticker says. It's not rocket science.

Vette_DD

Door jamb doesn't say anything about what pressure to run in a particular type tire. It says 30 PSI, period. Doesn't matter what type tire.

windyC6

Yea it may not be rocket science, but the door jam stickers are really only for the way the car came from the factory and that certain brand of tires that they used. While the door sticker is good average information and will suit most applications, the sticker doesn't always take into consideration of the variables that may or may not come when using different tires......

cclive

It's the size of the tire that matters...if they are factory size tires, then it's 30 cold. Runflat or not.

AORoads

I agree w. cclive and the others above on 30. And for those who want to "experiment" go right ahead. Just remember that, while the safety nuts at GM, and the tire manufacturers and all lawyers involved do some testing/legalizing and want to keep you safe as well as have max gas mileage and handling, they don't lock the tire valve. Which means, you can change it---you can put it to 1 lb. of pressure or 45-50 lbs. of pressure---as many have done and then come on here to ask, "Am I doing the right thing?" Answer: no.

The one thing you will never know unless you're a tire engineer who has access to, and can test cars and tires "tirelessly" to find out the laboratory answers on a track is, what happens if you lower the tire pressure 5 lbs. of pressure, or raise it by the same amount? Not in daily driving at 25 mph to the corner store. But, what happens in a 70 mph, panic swerve, while applying max brakes?

Will it spin? Will it lose a little traction causing you to over-correct? Will it slide 5 more feet than if it had X pounds of recommended pressure? Will that extra 5 feet put you: a) in a guardrail sideways, b) over the shoulder and into a deep ravine at 40 mph, c) cause your car to take just 5 feet longer which happens to be into the back end of a semi's trailer in front of you? You will never know. But, it's still your right to change the tire pressure because the valve stem cap is there for the twisting. As Clint would say, do you feel lucky? Let's be careful out there, too.

Boomer111

The car techs are told to air tires to 35 psi. All came about when fuel crises started. Federal guideline and in the C6 the tires will wear in center.

OlyC6

Yeah... seems like at "mechanic school" there is some course/class that says, "Be on the safe side... go with 35 psi...".

BUT.. combine that with the fact that 99% of techs use some sort of "Pencil" air gauge which IMHO are not accurate (I've seen +/- 2-3 lbs) over time and one needs to be diligent about double-checking pressures with a known accurate digital or at least a high-quality analog gauge that has been calibrated against an accurate reader.

windyC6

Yea...proper tire pressure is important, but i'm not gonna be a fanatic about it either. If a vehicle calls for 32-psi i'll check it every now and then to see where they are at. If they are 2-3 pounds off i'll add or let out as needed. But i'm not gonna drag out the hose very time I check and one or two may be 1/2 pound off. Thats like adding two tablespoons of oil when it's two tablespoons low.

Moonrunner

Usually, those people mounting yours tires are working minimum wage and one size fits all mentality when it comes to tire pressures. They don’t look at door jambs or manuals. 35 psi is a pretty safe middle ground on most vehicles. I check my tire pressure on my motorcycles weekly at minimum when riding regularly and my cars monthly or anytime the weather temperature changes more than 35 degrees on average highs. And anytime the vehicles have been to a dealership.

LMB-Z

I think most tires have writing on them that tell what pressure they are supposed to be run at. I would look at the tire and see what it says.

Moonrunner

The pressure listed on the tire itself is MAX pressure for MAX load, NOT what is normally recommended for many cars. My Nissan tires say max 40 on the tire but Nissan recommends 30 for the Pathfinder. I had a Motorhome with tires stating 80 psi on the tire which was fine for the rear but the same tire on the front was recommended by manufacturer to be at 60 psi in the front position.

IDSRVIT

Dealerships normally over inflate tires as a standard practices due to the amount of time vehicles sit on the lot.

They are supposed to check / bring the tires back to normal air pressure specs when they prep them for customer delivery but 9 times out of 10 they forget.