The door placard says 38/38 cold, which I might use if I was hauling 1000 plus pounds of cargo. The Raptor Assault team recommend 32F 28R cold pressure as a best case compromise on running unloaded, giving a ‘flat’ tire footprint and good traction to/from and while off roading. On the street, if you run 38 you’ll wear the inside of the tire MUCH faster than at more realistic pressures. That’s another trick Ford used to eke out more range on the Rap. You’ll give up some economy and max range, but it’s not terrible. Most of the time I’m running around 35F, 33 rear maybe as low as 34/32 on the street. I’ve had success on the street at that psi, but if I’m going to off road I’ll lower the range a bit or quite a bit as needed - I keep a compressor in the truck.