Best tire pressure range?

[scandata]

I have Pirelli P-Zeros. What would be the best tire pressure to get the longest life out of the tires? On the tire it reads, "not to exceed 40psi", and the DIC doesn't give a "Low Pressure" warning until it gets around 28. The Camaro owner's manual doesn't give an exact number to go by (I guess because there are so many different tires for different builds). I'm guessing the best would be right in the middle, around 34psi.

I assume it has a lot to do with driving habits and environment. I don't drive like a street racer, and I'm in SW Florida, where it's (dreadfully) humid and rarely goes below 70° during the day.

[1Coopgt]

Open your drivers door . Look at the end of the door or on the door jam . There is a label with the tire pressures right on it .

[PalmerGA]

Originally Posted by scandata

I have Pirelli P-Zeros. What would be the best tire pressure to get the longest life out of the tires? On the tire it reads, "not to exceed 40psi", and the DIC doesn't give a "Low Pressure" warning until it gets around 28. The Camaro owner's manual doesn't give an exact number to go by (I guess because there are so many different tires for different builds). I'm guessing the best would be right in the middle, around 34psi.

Damn! How long have you been driving?

Originally Posted by scandata

Open your drivers door . Look at the end of the door or on the door jam . There is a label with the tire pressures right on it.

^^^ THIS ^^^

[stock block]

34-35psi is perfect

[PalmerGA]

Originally Posted by stock block

34-35psi is perfect

I believe 36 psi (cold) is recommended for the P-Zeros.

[Night trained]

Always read a cars placard for tire and wheel specifications on any car.

[scandata]

Originally Posted by PalmerGA

Damn! How long have you been driving?



^^^ THIS ^^^

Sorry, I'm not in the habit of reading door jambs. I guess I should have checked there instead of the owner's manual or even, say, on the actual tire.

[stock block]

Originally Posted by PalmerGA

I believe 36 psi (cold) is recommended for the P-Zeros.

your most likely right ,but 1 or 2psi under or over is fine ,not going to flip over like a ford suv

[CamaroDreams76]

I run my car at 35 (cold) usually and over they year or whenever theyll bleed down to 32 (cold) then at around 30 I'll put them back up at 35. If you drive your car for a while on the streets, especially in the summer, you'll notice the pressure rise about 2-3 psi. Sarasota is only an hour/hour and a half north or me.

I'd run the 21in p-zeros you have at 32/33

[swagner]

OnStar suggests I keep mine at 36

[PalmerGA]

Originally Posted by scandata

Sorry, I'm not in the habit of reading door jambs.

That's okay. Tire/car manufacturers have been putting those placards on every car sold in the US for at least a couple of decades now. That's why I asked "How long have you been driving?".

It's not in the Owner's Manual because recommended PSIs vary by tire type/size/brand. It's not on the tire because the manufacturer does not know what kind of vehicle their tires are going to be used on - they only know the maximum PSI their tires are constructed/rated for to operate safely. If you check the PSI shown in your DIC, you'll see that the PSI can raise significantly as the tires warm up from driving - especially in hot summer weather.

Now you know how to determine the correct tire PSI and you can thrill and amaze your friends with this information.

[christianchevell]

The correct answer is 36 psi for optimal wear and mileage, and yes with temperature or operation making heat the PSI will vary. Now being around 40 degrees I have had to add several pounds to each tire versus say 60 to get to 36, and my new tires keep around the exact same pressure at 35-36 LBs . You run that cold, then it heats up a few PSI normally in operation.

[EMB135Driver]

Originally Posted by scandata

Sorry, I'm not in the habit of reading door jambs. I guess I should have checked there instead of the owner's manual or even, say, on the actual tire.

The number on the tire is the maximum pressure the tire can safely hold. A tire can be installed on many different cars of different weights.

The number on the door jamb is the optimum pressure for the tire as installed on a particular vehicle.

[VA SSHEVY]

I fill mine to a couple lbs greater than the door jamb when the tire is cold. Too much pressure and you'll lose traction quicker on wet roads. Too little and your car will not feel as quick. Maybe exaggerated, but like you're driving through sand. ANyway, that's how it feels to me SOTP.