PE00 020; CONSUMER WAS TRAVELING ABOUT 70MH ON HIGHWAY AND BACK REAR DRIVER'S TIRE TREAD SEPARATED, AND LOST CONTROL OF VEHICLE. TRUCK WAS CARRYING A CAMPER. VEHICLE FISHTAILED, AND VEHICLE WAS ON TWO TIRES. VEHICLE WENT INTO AN ENBANKMENT. THERE WERE NO INJURIES. TIRE FIRESTONE, #ATX. *AK