The way that Jim's post reads is that increasing the psi would reduce the "scrubbing " effect in sharp turns .
A weld break on a steel rv wheel is not caused by increasing the pressure .
The weld break is caused by other side loading or top loading pressures of the weight of the trailer but is not caused by too much psi .
Because increased psi actually reduces the side loading on the wheel at the weld one actually reduces the forces that would cause a weld failure .
The way the wheel manufacturer charts read is that the wheels are rated for a weight rating and that weight rating is achieved by using the maximum psi shown on the sidewall of the tire . Some have confused those charts to mean that the psi is the limiting factor when in fact it is the wheel load rating in pounds.
Which travel trailer manufacturer ships wheels with a 50 psi rating ?