After giving my 2005 F 150 a bath today I thought i would check my tire pressure. Well the gas door says 35 PSi max. My tires say 44 PSI max. Which one do I use? When I bought the truck the previous owner put custom rims on so the tires are not stock.

Brian

 

you don't really need the max pressure unless you're hauling a load. it'll rid rougher too. might be better for fuel economy tho. i run 45 psi all around in my 285's. the max on the sidewall says 65 psi. the sticker on the door is for the stock tires, but since you don't have them go by the tires max pressure you have now.

 

There is something in the owners manual about that. I have an '06 and I remember reading something that refers to the 35PSI. I will have to go out and get it, don't remember what the reasoning was. If you have an OM, might look in there. I'll check mine and see if I'm on crack or not.

 

i always like to run 35psi, and try not to eexceed 38 or so. good for the tires. Make sure you rotate them every 6 to 8 thousand miles

 

Play around and find your happy medium. Your truck will ride better with softer tires but will be quicker and get a little better mpg with hard tires. The max pressure is the one on your tires.

 

As already stated above^, you don't need to run the max pressure unless you are hauling a load. Otherwise, something less than max will be just fine. 35psi might be good for you. I run 40psi in my Yokohamas, that is what the tire shop inflated them at when I bought them last spring. They look good and handle great at 40psi, at 35psi, they look a little low.

 

Thanks guys. I am going to run at 40 PSI to see how that works.

Brian

 

I think the sticker on the door says 35 but I checked the pressure right after I bought it and they were all around 40 psi and up. Thought is was kinda wierd, especially since they looked a little low when I put them at 35.

 

Yeah, I think the sticker is really meant for the stock, from the factory, tires and not necessarily for anything you put on after that.

 

Yea that's what I mean. I had for a year and a half before I lifted it. I bought it new and stock tires had 40 psi in them when I first checked them.