Huntindog is slightly more right than ScottG in this particular instance .
But both agree that it is better to upgrade from the factory ST load range C tire .
Scott takes the position that he upgraded enough by going to a load range D .
Huntindog takes the position for a few dollars more there is an even better choice than an load range D on ST ( weaker scale than LT ) to the Load Range E tire to gain additional safety margin .
Looking at the manufacturers charts an Load Range E tire adds another pound or so of cords and rubber to allow 80 psi .
The load range D is lighter than the load range E but still heavier than the factory OEM load range C .
Both agree that upgrading at replacement time makes good sense .
Huntindog deals with temperatures that are average 20 degrees higher than Scott G does .
ScottyG probably is not planning to visit Huntindog in Arizona next August .