2011 FOREST RIVER WILDWOOD Tires Problems

I HAVE A 2011 FOREST RIVER BLUE RIDGE RV (3025 CABIN EDITION). THIS RV IS EQUIPPED WITH GOODYEAR MARATHON ST235/80R16 TIRES. I PURCHASED THIS RV IN NOV. 6, 2010. DURING OUT RECENT RETURN TRIP FROM MAINE WE HAD A BLOW OUT ON THE PASSENGER SIDE FRONT OF THE RV. I HAD CHECKED THE PRESSURES THROUGHOUT THIS TRIP. DURING EVER STOP I CHECKED THE TIRES FOR HEATING (LASER THERMO GUN). DURING THIS TRIP I HAD NO INDICATIONS OF OVERHEATING OR LOW PRESSURES. (ALL PRESSURE CHECKS WERE TAKEN WHILE THE TIRES WERE COLD DURING THE STAYS AT THE DIFFERENT KOA'S. ON AUG 2, 2012 WHILE TRAVELING ON I-81 IN VIRGINIA WE HAD THIS BLOW OUT. I HAD JUST CHECKED THE TIRES FOR TEMP CHANGES AT THE REST AREA. I CALLED GOOD SAMS TO GET ASSISTANCE IN THE TIRE CHANGE. I THEN MOVED FROM THE I-81 TO A GOODYEAR DEALERSHIP WHERE I HAD...