lostsoul

ok.. ok.. Im confused... so lets say..

I'm out in santa cruz.. inflate my tires to 30psi

THEN
: pick up a fat chick weighing 325lbs
: Cruse to Yosemite w/ 12K elevation
: 105 Deg w/ 80% humidity
: Then while driving I accidentally roll into a 3 foot deep puddle submerging the tire...

What would be the correct TPMS reading?

AZ99FRC

That depends. What is the fat chick wearing?

Crossed Flags Fan

Nada.....

BigBoyRon

I would predict the TPMS reading will be 27.5.

lavla

Hey, if GM says 30PSI, I'll go with that. On the other hand, I've already had to replace wheels because of the bent/cracked wheel issue. My question is, "Is there a better PSI to set so that there is less stress on the wheels (OEM wheels)?". Just asking, no flames please.

6Speeder

I wouldn't change air pressure based on fears of bent wheels. The tires are so stiff being run flats that small changes in pressure won't help the stress the wheels are facing. Go with whatever cold pressures give you the best tire wear and call it a day.

My opinion: Unless you are running the car REALLY hard, or racing, and are still running the stock tires/wheels/suspension pieces, go with 30 PSI cold.

Navy01Coupe

30 PSI cold. Got it.

But this week it is 96 degrees in my garage. So, COLD is a relative term.

JMII

A few PSI here or there is not going to cause problems. You don't need NASA levels of precision on a street driven vehicle. The most important thing is to check your air pressure often as tires lose air over time. So if your like the average 'Vette owner and you don't drive many miles you might be in for a surprise the next time you pull the car of out of the garage.

BigBoyRon

and that is parked in the shade!

6spdC6

My Vette winters for about 6 months a year. It is in a unheated but under house garage and the coldest I have seen garage go is 38. The outside temperatures been known to go down to -28F at night. Sub zeros for a week at a time are normal up here! (upper NYS)

I raise the tire pressures to about 33 when I put it away, and normally I have about 30 PSI in them in April when I activate the car. This is over 4 Vettes in a 22 year period, so for me this is a sort of constant.

Elk

It certainly is in your case.

But ambient temperature is ambient temperature. If you are typically driving when it is 90 degrees, set the air pressure to 30 psi when the "cold" temperature is 90. You may well end up leaving air out of your tires.

Hang in there!

Vet Interested

Four pages on tire pressure. Impressive!

MMD

Ask Kev Jones opinion. He should be able to get you within + or - 5 psi of what you need. Think he said he has a degree in air pressure technology.

madrob2020

HOT AIR or air pressure? Just kidding!

Navy01Coupe

This might be my new favorite Forum string.

Bird67

Resurrecting this thread to pose a specific question. In this thread it seems like 30 psi cold is a consensus proper air level. That is also what is on the tag inside the driver door.

Question: does anyone think that should change if I have swapped out the OEM summer only tires for Pilot Sport A/S 3+? Mine is a 2016 Z51.

Thanks...!

NashvilleGrandSport

I have BOTH the PSS and AS/3+. I set cold at 30 psi in both sets per door jamb.

Gearhead Jim

^^^

Me too!

sgt1372

I raised the air temp in all 4 of the non-run flat Michelin PSS tires on my car to 32.5 psi. The computer reads the running tire pressures at about 36-37. Have had no traction or any other problems using these tire pressures.

Personally, as between 30-32.5, I don't think it really matters for the street.

I just raised the psi a bit because it made me feel better in terms or providing some additional rigidity to the extremely low sidewall PSS tires in order to reduce the possibility of damaging the bend/crack prone wheels on the car.

Har-ray

My door jamb reads 35 PSI. Sometimes, in the hot Fla. summers, on the highway; the pressure will go up to 40PSI!
NOTE: I did get 40k mi. out of the PSS tires, keeping them st 35 PSI cold.