[greasemonkey]

When I worked at a tire shop years ago, most owners would run about 65 front/ 55 rear or 60/50 depending on the configuration of the truck.
My brother in law bought a 2500 Ram that has 80/80 on the door placard. He tried to bump them down due to not towing/hauling and set off the TPMS around 70 psi. He tried to get it reprogrammed and the dealer told him due to legal issues, they weren't allowed to. Apparently they had too many cases of people attempting to max out the GVW without raising the pressures to compensate, so Ram was forced to set the pressures to the max. Sacrifice tire wear for safety, I guess.