Yup.
Tire Pressure
Thread Starter
Racer
Joined: Jun 2017
Posts: 314
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From: A galaxy far far away.
Tire Pressure
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.
Boy, I feel like a baffoon. I just saw the post below on the same subject. Never mind.
Last edited by Olsarge; Dec 29, 2017 at 03:51 PM.
Race Director
Joined: Dec 2002
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From: Wayne Township WI
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.
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.
Thread Starter
Racer
Joined: Jun 2017
Posts: 314
Likes: 93
From: A galaxy far far away.
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.
Team Owner
Joined: Mar 2014
Posts: 21,631
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From: Below the bottom of Berby Hollow, NYS
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.
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.
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Le Mans Master
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St. Jude Donor '14-'15
Safety Car
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From: Magnolia Texas
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.
Race Director
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From: Toronto, Canada
C7 of the Year - Unmodified Finalist 2021
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
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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.
Team Owner
Joined: Apr 2013
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From: Chirper Island
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.
Melting Slicks
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Last edited by NOWUCME; Dec 30, 2017 at 01:51 AM.
Team Owner
Joined: Mar 2014
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From: Below the bottom of Berby Hollow, NYS
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.
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.
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.
Team Owner
Joined: Apr 2013
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From: Chirper Island
, 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.
Exception ID 10T
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From: NW of Jacksonville FL
Team Owner
Joined: Mar 2014
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From: Below the bottom of Berby Hollow, NYS
LOL, here you go....
https://www.intercompracing.com/99.9...-180-l-en.html
https://www.intercompracing.com/99.9...-180-l-en.html
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.
Team Owner
Joined: Aug 2006
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From: Raleigh
But what if you are using nitrogen. Would you need to alter pressure by say .09 psi per tire ?
Team Owner
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From: Below the bottom of Berby Hollow, NYS
Attachment 48336260
Safety Car
Joined: Jan 2011
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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.