Am in the process of replacing the tires on the trailer. Current tires (and the ones which came with trailer) are load range C and maximum psi is 50. Have been looking at the new Goodyear Endurance...
It may be much ado about nothing, but Dexstar does have a PSI chart for their wheels. I would also be leery of putting D tires on a Chinese rim that probably was made at the absolute least specs for a C tire.