rhagfo wrote:
You will get two schools of thought with tire pressure!
There is the group the believes that the yellow sticker is the do all for all loads. For most this is about 80 psi.
Then there is the group that use the yellow sticker as a guide for loaded, adjust for the unloaded condition. Running lower rear pressure when unloaded based on weight, this will improve traction and tire wear.
I am with the second group, instead of adding weight to the bed to reduce tire spin, lower tire pressure to get a better contact patch.
My experience is to run the recommended tire pressure on the door panel which provides a good compromise on ride quality, tire life, and fuel economy. My Super Duty sticker states 65 psi on all tires and that's what I run.
Also on 4 wheel drive trucks with a solid front axle is more prone to exhibiting the death wobble on lower tire pressure on the front tires. In addition it's been my experience that I can get more miles out of a set of tires by running the door sticker tire pressure vs running less pressure.