Power Hawk

Interesting thread. My 2016 Stingray's door jam calls for 30 PSI. It has 19" front tires, and 20" rear tires. An increase of 5 pounds is not uncommon once tires warm up from a few miles of driving.

Ron Miller

I guess that's one difference in 19/20" tires and 18/19" tires on the 2016 Stingray. Here's a copy of the Tire Pressure Label on my 2016 convertible with 18" front and 19" rear tires, 35 psi cold all around.

hawkandersonjr

My 2017 stingray with 18 front and 19 rear shows 35 PSI in all four tires on the inner door jam. I am going to get me a good air pressure gage and set them at 35 PSI and that will be the end of the tire pressure question for me.

Walt White Coupe

^^^^^^
People have to live with the choices they make in life. Be prepared to replace your tires because of uneven wear in the center of all of your tires.

mbaessler

All the tires are the same on the Base Stingray(non Z-51). 18's and 19's. No matter what year. For some reason on the 2017's they have 35. All other years I think have 32lbs. I run mine at 32. 35 was for gas mileage someone said, why the 2017 year, who knows. Also if 35LBS is too much. You may have uneven wear up the center. Don't know if 3lbs really makes that much difference but to me 35lbs rides too hard.

Ron Miller

I'd recommend you take a look at the tire pressure label shown in post #22 above for my 2016 Corvette . . . . . . 2017 is not the only year for 35 psi recommended pressure for tires. I can only speak for mine, not sure of any other years.

Walt White Coupe

^^^^^^
It was 35 psi for 2016's also with the standard 18/19 wheels. All others C6, C7 & C8 have 30 psi on the door jamb. So it's a 5 psi difference. That makes a difference.

mbaessler

Thanks Walt for the clarification. I think I will run mine at 30lbs. It's funny, when the my 2017 gets down to 32LBS I get a low pressure warning because of the 35lbs. I wonder who thought 35lbs for two model years (16 $ 17) was a good idea?

eboggs_jkvl

I'd hazard a guess that it was GM doing a Texas 2-step to get a gazillionth of a MPG improvement to make some silly assed number the EPA tossed out to save the planet.

Elmer

Ron Blumer

I have a 2017 that says 35 and my buddy’s 19 says 30 I split the difference and run 31.5

aklim

32.5 is splitting the difference. We're the tires different stock?

Ron Blumer

Yeah I meant 32.5, my buddy’s has 19’s and 20’s and mine has 18’s and 19’s could be the difference?

aklim

What is wrong with the stock pressure? I have found it to be reasonable unless tracking. Just curious.

madrob2020

WOWSER 🙄. You folks must lead a very worrisome life. Reminds me of another OCD post couple years ago—BUT WHAT ABOUT WHEN *****? He said he/she would stop after driving “awhile” and let air out of the tires to keep them at 30psi after they had risen a few degrees 👀

aklim

I take pressure in the am when the car is left outside overnight and be done with it.

Kangarew

Engineers, race crews and aviators are well versed in managing tire pressures because it is so important to keep tires working properly and preventing blow outs. Imagine an aircraft descending from cold altitudes (very cold tire) and the tire spins up instantly on hot pavement. That is a rapid increase in tire pressure! Corvette tires also increase pressure as we drive (on the track is an even more dramatic increase).

Engineers use a basic referenced starting point for cold tire pressure called “standard day pressure.” Keep in mind that we are merely checking differential pressure when we check our tires. A standard day is 15 degrees Celsius (or 59 degrees F), 60 percent relative humidity at sea level with standard atmospheric pressure of 29.92 inches of mercury (or 14.7 lbs per square inch). If you can approximate these conditions or mathematically adjust for these 4 variables, you will achieve a more accurate tire pressure.

Ultimately, it is a bit like measuring with a micrometer, marking with chalk, and cutting with an axe.

Ron Blumer

I live in Phoenix and the hight temps do really increase the pressure in the tires!

eboggs_jkvl

Um, if the tire pressure starts out at 30PSI, it will increase for 4 - 6 psi as normal as the tire temperature increases. Doesn't really matter where you live. It starts at 30PSI and goes up. It won't blow up the tires and have them explode.


Elmer

aklim

I've had TPMS warning for low pressure in the am. I usually prefer to over inflate the night before, leave it outside and adjust it in the morning. Between over inflation or under, I'd prefer over.

Red08

My 2014 with 20" rears and 19" fronts show 30 psi on the door sticker. I keep them all inflated to 35 psi during winter storage.