Recommended cold PSI is 60 front & 65 rear. They are Michelin 275/65/20 load range E on a 2017 F250 Power Stroke. Should I increase the pressure when towing my 39' toy hauler (Triton by Voltage)?
Unless you just want to blindly run the CYA pressures posted by manufacturers know your actual loaded and unloaded weights. In my experience of doing so for hundreds of thousands of miles it's best to add 10psi front and 5 psi to the rears over what the chart requires.