I know this is kind of a noob question, but I want to be more secure about this. What air pressure should I be using on my front and back tires? these are the numbers on my tires P245 70R16

 

40psi max i think. ive got the same size tires as you. 35 is what most people use on here.

 

Morning Thunder, I was thinking 34, but I'll make sure I have 35 in the four of them, thanks for the quick answer

 

i thought u had the 4.7? not the 3.9?

saw your editted post from yesterday. nvm

 

Yea, I am still missing some info on the truck since I got it like 2 days ago so this morning while I was getting my tags paperwork ready I saw the info, and updated it in my signature too.

 

The tire sidewall says the max pressure - Different rated tires will have different pressures. For example a load class C tire is max 35 psi but a load class E tire has a max of 90psi.

Just look on the sidewall & it will tell you the pressure to run.

 

Thanks midget, I added 35psi on each today and went for a test on I-55 at 80mph hehe it runs smooth