I do 98% of my driving unloaded and almost never tow. (Kinda weird for an F350 huh) I know that the truck recommends going with 65psi front and 80psi rear but the rear tires seem to not be wearing evenly across the tread pattern. The edges still have the little rubber stubs sticking out of them even after almost 3000 miles. Should I be running a lower tires pressure in the rear when empty or should I just let tire rotations take care of the uneven wear. If I should air down, what pressure would you guys recommend? The front tires are wearing normally at 65psi and they have more weight on them then the rear.

 

I run 60psi in the front and 55psi in the rear when unloaded. Learned that from watching my tire wear. Sounds like you are seeing the same thing. I would think different brands of tires will have slightly different optimum tire pressure settings. What tires are you running?

 

Mine are the stock 20 inch Michelin LTX A/T 2.

 

I run the BFG commercials, which are pretty stiff.

You could do the chalk test, but you already have 3k on the tires. I don't know if that is going to tell you anything. I would suggest the chalk test on new tires.

Since you can see uneven wear I would recommend airing down on your rears some. Don't go too far, maybe 10-15psi. Make sure you air up if you haul or tow anything heavy.

 

So I have to ask if you drive unload truck and never tow anything why did you buy this truck?

 

Mine are the stock 20 inch Michelin LTX A/T 2.

 

I plan on getting a slide in truck camper in a year or two and will need the F350 then. I also need to tow a heavy load two or three times a year (farm machinery/dump trailer). But most of my driving is unloaded at this point.

 

Maybe just because he wants to and can afford to...
Or he just loves the truck

 

Not everyone has to justify it. These are great pickups.
Most half ton pickups aren't used as one either.

Anyways, I never ran my OEM tires per the door.
Mine were ContiTracs and they wore OK for crappy tires.
80 at the rear unloaded will jar your bones.
I ran the fronts at 70 and the rears at 65 empty most of the time.
Anything below 62 will trip the TPMS.

 

When I know that I will be empty for a while, I run at 65psi all around

 

I will try 65 all around and see how that goes. Good to hear others are doing it as well.

 

The DRW is specked at 75 front 65 rear.
I have weighed the truck several times with the 5th wheel trailer. And each time the weight on the front axle was within 20 pounds or so - with trailer or no trailer.

So the fronts are kept at the 70-75 range.

Rears are 65 during the camping season and once I stop I will lower them to 55.

Over 28K so far on the original tires with 8500 of that pulling an 18K trailer with 2600-3200 pounds of pin weight

 

I keep my fronts at 44 and my rear at 42 when I'm empty-ish. This gives me a really nice ride on and off road.

 

How do you do this without tripping the Low air pressure warning???

 

No matter what.Superduty would eat them alive that low of air pressure.