Brandons98GT

What is the best tire pressure for 245/45/17 to wear evenly and for 275/40/17 thanks

SVTBill

35psi will give you slightly better mpg, while 30 psi will give you a slightly better ride quality

203Mach1ne

32 psi ... happy medium

Colorado_Mustang

The most pressure you can put into the tire with the full width of the tread contacting the ground. You can check this with a chalk mark across your tread and moving the car around to find the wear zone.

Fizzics Boy

thats what i keep mine at

lsustang04

Anywhere from 32--35 psi for ride quality and gas mpg.

Pitt

So if tire says 50 psi Max pressure, you keep it at 32 psi? If not, what is the Max psi stated on the tire?

aMerICAn_mUsCLe79

the max that the tire can hold....alot of ppl do that and put 40 psi in there tire b/c the tire seys so, but always go my what the car seys (doorjam or manual)

97targa

The reality of it all is that it depends on the Tire manufacturer and Compund used to make it. The "doorjamb" pressure is just a precautionary measure to save the freakin car manufacturs *** incase a lawsuit comes into play. 35psi is really the best overall wear for MOST tires. It will be rougher on your suspension components and balljoints etc. A lower pressureized tire will get more bite, but can be punctured easier. Be aware when you put 40psi in your tire, this is not good, especially if you plan to run your car up over 100mph. At that speed your tire pressure raises roughly 6psi from where you measured it cold! Air expands when it gets warm! Wouldn't be a good thing. I like 35psi so I can take the turns hard and get even wear accross the bottom. I know it's even wear because I did a burnout at 30psi, 32psi, 34psi and 36psi...lol