Is it your belief that the steel wheel will fail before the rubber tire will fail due to over-inflation ?
Increasing the PSI is a major method used by the tire manufacturers to carry additional load .
We see this in LT and ST and commercial tires (100 psi plus ) .
I think you are reading something into a chart that has nothing to do with the wheel capacity to carry additional psi .
Maintaining that nobody should inflate to 65 or 80 PSI robs all of the uninformed from making the rational choice to move to a load range D or load range E tire .
The Maxxis Cheerleaders want to rob us of the rational choice .
CapriRacer has posted that the wheel manufacturers do not have PSI as a factor in rating their wheels . Only a weight rating .
Lets be safe out there .
Does your RV steel wheel have a stamp that says " Maximum 50 PSI " ?