Tire Air Pressure
Thread Starter
Race Director
Joined: May 2012
Posts: 15,763
Likes: 3,281
From: Phoenix area, AZ
Tire Air Pressure
Is it normal for the air in my Goodyear Eagle F1 EMT tires to fluctuate as high as 33 pounds hot from 29 cold? Also, I have one tire that's about a half-pound off from the others when cold, but it's only showing 31 pounds when the rest are showing 33; is this normal too, or no? This is my first experience with run-flats and don't know much about them.
Thanks!
Thanks!
Melting Slicks
Joined: Dec 2003
Posts: 2,857
Likes: 2
From: pawleys island sc
as far as tire pressure run flats are the same as any other tire. The answer to your fuirst question ( 29 t0 31psi) that's about normaL, dependent on the ambient temperature.
As for you second question, I'm sorry, I don't understand your concern. If one tire is 2 pounds off the others, just add 2 pounds of air to that tire.
As for you second question, I'm sorry, I don't understand your concern. If one tire is 2 pounds off the others, just add 2 pounds of air to that tire.
Thread Starter
Race Director
Joined: May 2012
Posts: 15,763
Likes: 3,281
From: Phoenix area, AZ
The tires are going from 29 to 33, not 31. My concern about the other is that it's only about a half pound off cold, but changes to a 2 pound difference when hot, which is different from the gain in the other 3 tires. I know it's a minor concern, but still a concern nonetheless.
Thread Starter
Race Director
Joined: May 2012
Posts: 15,763
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From: Phoenix area, AZ
Drifting
Joined: Jan 2008
Posts: 1,722
Likes: 138
From: Florida
St. Jude Donor '09
Are you measuring the tire's pressure with a gage or relying on the TPMS? That is not a large varyance in pressure. I sincerily doubt you will experience measurable uneven tire wear from that small of a difference.
Team Owner
Joined: May 2001
Posts: 87,357
Likes: 1,592
From: Western NY
I have a digital tire gauge that was calibrated in the "standards lab" where I used to work. I can get all of my tires at the exact same pressure with this gauge, yet the DIC generally doesn't read them all the same. They are, however, usually within a pound....
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Tech Contributor
Joined: Dec 2003
Posts: 19,384
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From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
4 psi variation is quite normal.As for wear, Im on my 3rd set of tires. The rears wear before the fronts. I've always run about 2 psi light but even so, the centers have worn out first.
My best advice is don't inflate over 30 psi.
Pro
Joined: May 2011
Posts: 578
Likes: 1
From: Boiling Springs Pennsylvania
Oldtimer
I filled and gauge checked my tires (Goodyear RF's stock sizes) at 30 lbs all around and went for a ride with the top down and a screaming woman next to me telling me that I was going too fast. Upon my return., a short run of 40 miles at varying speeds and an ambient temp of 84, the tpms reading was 36 all around. When the air temp is lower the increase is lower. Don't worry what the TPMS says; just gauge your tires frequently depending on your driving habits and quit worrying about tire wear (that's one of the perks of Corvette ownership - perks for the many tire places to see a beautiful car and take a lot of your money
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Thread Starter
Race Director
Joined: May 2012
Posts: 15,763
Likes: 3,281
From: Phoenix area, AZ
TPMS until I can get down to Fry's for a replacement battery for the digital guage. My standard guage broke not too long ago and I keep forgetting to get another when I go to the parts store.
