2004 FORD F-650 SD Tires Problems

HANKOOK TIRES ARE BEING INSTALLED ON VEHICLES WHICH REQUIRE A LOAD RANGE HIGHER THAN A PASSENGER TIRE P235/R16 SL. THESE VEHICLES WEIGH IN AT 24,000 LBS GVW AND AT TIMES CAN BE OVERLOADED. THEY ALSO DO NOT TAKE INTO ACCOUNT THE 5% SAFETY FACTOR SINCE THE REARS ARE ON DUALS. TIRES WERE WEARING EXTREMELY FAST AND SOME WERE DEVELOPING SEPARATIONS IN THE TREAD AND SIDEWALL AREAS AS WELL AS A NUMBER OF THEM BLEW OUT. IT WAS RECOMMENDS THEY MOVE TO A RADIAL TRUCK TIRE LR E AND THEY WERE CONVINCED THIS WAS THE WAY TO GO SINCE THEY WOULD HAVE A RETREADABLE CASING AND MORE CARRYING CAPACITY. I INSTALLED GOODYEAR RADIAL LT ON ALL SIX POSITIONS. I WAS CHASTISED ALONG WITH MY ASSISTANT FOR DOING SO BY (SHAWNEE MISSION FORD) FOR PUTTING RADIAL TRUCK TIRES ON WHICH WOULD LAST THREE TIMES AS LONG AND CUT INTO THEIR PURCHASES WHICH...