PE00020; TIRE TREAD SEPARATION: WHILE DRIVING 73 MPH TREAD ON THE PASSENGER'S SIDE REAR TIRE CAME OFF. THIS CAUSED EXPLORER TO PULL TO THE RIGHT AND FLIP OVER. DRIVER WAS ALONE IN THE EXPLORER, AND SUSTAINED INJURIES TO HEAD,/BACK AND KNEE. TIRE WAS A FIRESTONE, ATX, NOT ORIGINAL EQUIPMENT. TIRES WERE PLACED ON VEHICLE BY FIRESTONE DEALERSHIP. EXPLORER WAS TOTALLED. PLEASE LIST TIRE SIZE AND DOT #.*AK