Olsarge

I'm confused. I just bought a 2012 GS 4LT from a forum member. I love the car. On the B-pillar sticker it says inflate tires to 30psi. In the book it says inflate tires as stated on tire side wall or 38psi, which ever is less. On the tire side wall it say maximum load ... at 51psi. The car has Bridgestone Pontenza RE050A run flats. What air pressure should I be running in these tires?

Boy, I feel like a baffoon. I just saw the post below on the same subject. Never mind.

Landru

I've always run 30-31, cold.
Doesn't take long w/ some heat to hit 34-35.
Never any abnormal tire wear.

Sometimes Owner's Manuals are too smart by half.
Try being all things to all people while reaching none, only confusion.
Follow BC sticker, same one's went on every C6 ever built.

Olsarge

Yeah, I went to a tire store and had him put 31 psi all the way around with his digital guage. As I drove off I checked the DIC. It read 32 psi in every tire. I figure I'll leave it just as it is and check the DIC for a while.

Bruze

SOME BASICS, from yesteryear, although I don't think things have changed:

The pressure number on tires is for A MAXIMUM LOAD on the tire, and that number (in pounds, maybe in Kg nowadays too?) is also molded into the tire. A passenger car will never come close to having that kind of load, SO IGNORE THAT PSI NUMBER.

Therefore, always go by the sticker on the door jamb. The manufacturer has figured out what load is on the OEM tires and has given you the recommended PSI -- WHICH IS ALWAYS GIVEN AS COLD. Yes, the engineers know the pressure will go up as the tires warm.

Turbo6TA

Fact !

Go by whats on the driver's door sticker (30 psi cold)

ls1121

Yup.
After a few miles on the highway my pressure usually is 34 psi. my tires last a long time and the wear is even across thr face when i replace them.

dpigguy

We use to have a tire engineer on forum who recommended 31 front and 30 rear pressures cold. Been using that advice for 10 years and have no abnormal wear issues. DIC is 2 psi higher. Always use same gauge to set pressures as well. Alignment seems far more problematic to tire wear than pressures.

Mad*Max

31 or 32 - it will not make a difference and by the way when you drive the tire pressure increases by a up to a few psi

Cherokee Nation

That was Wolfdog.and he was always correct.

owc6

Heck, the pressure could change more than that from one side to the other by where the sun is shining on the car.

I've had my tires actually increase by more than ten psi in one day. I started out in the cold rain (mid 50s temp) in Kansas City, and drove to Denver at 98 degrees. They were bumping up against the high pressure warning. I just let some air out.

For general use, I think people overthink this whole subject.

NOWUCME

OP, you don't have to feel like a Buffoon. You can delete your post, have to be logged in. Push the edit tab at the bottom of post, press the Delete tab, follow it to the delete Message there and Whamo....you are not a Buffoon anymore.

RobLo

You're talking about your C7 correct? Our '05's don't have a high pressure warning, do they?

Bruze

I run my fronts at 30.62 and rears at 31.12 if the ambient temp is between 68 and 76. If the temp changes I adjust tires as necessary.

Finding a gauge that reads to hundredths and was calibrated down to that level wasn't easy but you gotta do what you gotta do.

RPOZ4Z

ALWAYS go by the vehicle manufacturer recommended tire pressures listed on the label in the door jam.. ALWAYS!

owc6

Even though I've been known to post in the wrong forum , this applies to the entire C6 generation.

At 42 psi, the DIC will give a HIGH TIRE PRESSURE warning, and will then display the psi, and switch back and forth between the two until you dismiss the message (press reset). It will warn you again in ten minutes.

Null Pointer

LOL, here you go....
https://www.intercompracing.com/99.9...-180-l-en.html

Bruze

Yes! That's it!

Every Corvette owner needs at least one to carry with them at all times. When I get to the diner (5 miles away) I always check the pressure and adjust as necessary before coming back home.

z06inVB

Bruze

I never use pure nitrogen. I often mix it equally with two parts oxygen and 3¼ parts iron fumes so I don't need to adjust the pressure. My stock LS2 will do 210+ MPH thanks to this little secret.

Attachment 48336260

windyC6

Well yea.....alignment is always the hairy beast when it comes to poor tire wear. Tire wear from wrong pressure is an easy fix....just ad or let a little out......