There is a better LT tire option :
Goodyear Cargo G26 size 225 /70R15 load range D .
It is placarded at 2470 # on the LT scale at 65 psi
It fits every wheel that your current ST 225/75r15 load range C fits without modification .
It is made in Germany or France .
It weighs about 33 #
The G26 is widely available from Goodyear stores and Tire Rack .
This is not to be confused with a Marathon Radial ST tire .
G26 Speed rating is 106 mph , not 65 mph like your current ST tire .
It is a myth that RV steel wheels will not take 80 psi according to Dexstar .
The G26 is a 65 psi tire .
