LANDROVER, DISCOVERY SE7 1996; THESE ARE NOT THE ORIGINAL TIRES. THESE WILDERNESS HT2 TIRES WERE REPLACED BY COMPANY WITH THE EXCEPTION OF TWO REAR TIRES. RIGHT REAR TIRE TREAD SEPARATED WHILE TRAVELING 68 MPH. VEHICLE BECAME NON RESPONSIVE, HITTING MEDIAN, AND THEN ROLLING OVER. ALSO, NO AIR BAGS DEPLOYED. PLEASE DESCRIBE DETAILS.*AK