Originally Posted by Capt Jeff
I plan to replace tires with Load Rating "D" which is 2540 ibs with 65 psi. My 25' Safari has a GVWR of 6300 lbs. The Load Rating "C" which is 2150 lbs at 50 psi or 8600 lbs total should handle my trailer. Tires are ST225x75x15. I prefer the 50 psi. I have read most of the posts on tires but not much on changing load rating. Thanks for your help.
This sounds like a terribly idea.
One of the principals in engineering is to "under-utilize" - that is, specify a larger component than is needed in order to reduce the risk of failure. Of course, the larger the component, the less risk.
We all know about the issues with ST tires and going larger seems to be one of the fixes to the issue. You're trying to go the opposite direction - and we know that is the wrong way.