I have a 2000 F150 XLT with new Uniroyal Laredo AWT tires on it. The tire wall says max pressure 50 psi. However, the sticker in my door jam says max is 35 psi. Which should I go by?

 

The max pressure listed on the tire's sidewall is for towing/hauling heavy loads, not daily driving. For daily driving, you should be somewhere between the two. 40psi is usually a good starting point.

 

Start by running 35 psi. If you feel the need to adjust you have a few psi you can go up to. For instance my tires (OEM) say 44 max psi and the recommended pressure is 35. Personally I prefer 38 psi in my tires. Remember it is about pressure not volume so 35 psi is all you need. There are always discussions and post about this but the door sticker is what you go by. If you are hauling or towing you might go to 40, but 50 should never be used.

 

all depends on the load range of your tire, number of ply's, running a 10 ply tire load range E at 50 psi will be fine, runing it at 35 psi will wreck the tires, if tires are oem, stay with the info on the door jam...I run my BFG LT RT/TA at 55 psi on average, max psi on the side wall of this tire is 65 psi, most LT rated tires on a 1/2 ton are 4 to 6ply C, D load range, 40 to 50 psi is fine..

 

My tires are Load Range "C". I don't haul heavy loads but will be towing a 2500 pound bass boat come spring. Right now I just use the truck to drive to work everyday and would like to exceed 35 if possible to get better gas mileage.

 

If you are worried about being over inflated at 35 psi don't worry, you are very safe there.

 

For that vehicle and a load range C tire, 36-38 would be about right. That is what I ran my 98 and 01 load range C tires at.