Let me see if I understand correctly.
You say that an ST tire needs a 15% reserve and should not be loaded beyond 85% of sidewall capacity. Also, you indicate that the LT tire can be used at 100% of it's sidewall capacity.
If this is true, then a lot of manufacturers of RV's are doing their customers a disservice by putting underrated tires on their vehicles. One that comes to mind is JAYCO that still installs 16" load range "D" ST tires with a 3000# load capacity on rigs with 6K axles. Don't believe me? Go to your nearest dealer and take a look.
Keith
