CAR STARTED VIBRATING HEAVILY IN SPEED OVER 30MPH. TOOK VEHICLE IN FOR SERVICE, AND WAS TOLD TIRES WERE DEFECTIVE. PURCHASED NEW TIRES FROM DEALER . WHILE AT THE DEALERSHIP WAS APPROACHED BY ANOTHER CUSTOMER WHO HAD ALSO BEEN TOLD THAT THE TIRES ON THEIR NAVIGATOR HAD FAILED AT 30,000 MILES. SAW ON ABC NEWS TONIGHT ( 9/18/00) THAT THESE TIRES WERE BEING LOOKED INTO FOR FAILURE IN SAUDI ARABIA. I THINK THIS PROBLEM NEEDS TO BE LOOKED INTO HERE IN THE UNITED STATES ALSO.WHILE PICKING UP MY VEHICLE I WAS ALSO INFORMED THAT TIRE FAILURE OCCURED ON A TRUCK WITH THE SAME TIRES AT ONLY 11,000 MILES. I WOULD APPRECIATE MORE INFORMATION, AS I DO NOT WANT TO PUT MY FAMILY IN JEOPARDY IF THESE TIRES ARE DEFECTIVE AS SUSPECTED.( DOT NUMBER: TIRE SIZE: P245/75R16 )