Join Date: Mar 2010
Location: Sugar Land, TX
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I've played a little bit w/ tire pressures and have found on my stock BFG AT KO's that front at 60 and rears at 55 (no load or towing) seems to be the best ride and handling. Didn't notice what engine you have. The PSD is heavier than the V10.
When I start to tow I increase the rear to 65 but leave the front at 60.
It's well within the load limit of the tires (E rated), gives a good contact patch, and does not "wander" but then my tongue weight is light at 1000#. I'd suggest you go to a scale and weight the beast with a full load of fuel and the driver (front and rear) so you have an idea what loads are actually being carried.
The other thing you can do is the "Chaulk test". Run a couple of lines across the tread with chaulk and then move the truck forward until a couple of revolutions of the tire have taken place. Check the Chaulk mark and see if it is evenly "worn".
2011 F350 King Ranch CCLB 4WD, 6.7L,Bilstein Shocks, Hellwig Sway Bar.