Increase Tire Pressure on 2005 F-150 Screw
 

The factory tire pressure on 18" stock Lariat Screw is 35 psi. I increased to 40 psi and my truck rides so much smoother. IS there any problem with increasing 5 psi?? Also, what is difference between cold and hot tire pressure?? Thanks.

Hot and Cold tire pressure. Air expands when it is heated, and does so even in your tires. The air is heated after you have driven your truck, which would be your Hot tire pressure. Cold tire pressure is when your truck has not been driven and the pressure is checked, usually 1st thing in the morning or after it has sat for a while.

Nope, I don't think 5 psi will make a big deal. But then again that is only MY opinion. :rolleyes:

Same situation here (2004 Screw Lariat 4x4). I have bought new tires and rims recently though. Not on the truck yet..

Does anyone know what the increase is between cold and hot psi???

I read somewhere that you could increase your maximum tire pressure if you run a lot of higher speeds. I personally, run the maximum on the tires because I run 90% highway and we all know the less rolling resistance we have the better our gas mileage.

Well, not for your particular instance... But, I run my travel trailer tires at 40 psi even though the tires has 35 psi stamped on it.....

I've found that when I run 35 in them, the "hot" psi is some 15 psi more..... (I just use my gauge and see what it is...) Making them about 50 psi.... When I do the same run @ 40 psi, in ~ the same temp, they are actually only running around 45 psi..... Feel cooler to the touch too....

Now, that's on a set of four trailer tires that are running pretty much at their max load rating... On a truck, you are not even close to the max load ratings of the tires, so at the worst you would be doing is wearing the centers down a little faster.... BFD....;)

Let the 'P' rated tires wear out... Then get some LT load range C tires and you'll be a much happier camper! I know I was when I made the switch! I run 'em at 44 up front and 40 in the rear when empty. When I load it up, I'll run 'em all at 50.. Works for me and I've gotten a solid 40k miles out of a set of tires with lots of tread left, but I just wanted new tires! I'm on the same mark with my current set of tires now!

Good luck!

Mitch

The tires are BFG Long Trail T/A 18" P rated that come stock on the Lariat Screw. The sidewall says 35psi max as does the sticker on the door. The tires look so much better and ride better at 40psi which is why I ask is this ok?

yooo what up?