Mine were delivered at 38 psi x 4 and I’ve left them there so far.
This is going to depend largely on how you drive and where.
I don’t think we’ll be concerned about rolling over the tire on the sidewall... Mine tend to start sliding before I’m rolling onto the sidewall and it doesn’t take a lot of work to break traction on these tires. Not a knock on the tires, they’re not F1’s, or Pilot Powers, their mission is a bit different. So far on the street mine have handled adequately at reasonable speeds under reasonable conditions.
To me the back of the truck feels too ready to break loose, but I’m wanting some more saddle time before messing with pressures.