I can't seem to find such a chart on any of the tire manufacturer sites, even though I am certain that they were required to develop during engineering and DOT approval process.
Within the choice of new tires for my RAM 1500, there are 44 psi max tires and 51 psi max tires, all of which are load index 115T.
Question 1: What is the load capacity for a 44 psi versus 51 psi when tire pressure is set at the truck placard's pressure of 40 psi? Which one is capable of handling more load?
Question 2: When having weight in the bed plus tongue weight of a 6600 lb trailer, am I better off using a 44 psi max tire inflated to 44, or a 51 psi max tire inflated to 51? Isn't rolling resistance a function of tire roundness and footprint?