I HAVE A SET OF MASTERCRAFT COURSER A/T (COOPER TIRES). THE DOT # IS 3DYU 0705 2G13L. TWO WEEKS AGO I HAD A LARGE BUBBLE ON ONE TIRE AND HAD IT REPLACED. TODAY I HAD ANOTHER ONE WHERE THE TREAD BLEW OUT CAUSING ME TO WRECK. THE TIRE STORE HAS SAID THAT THE TREAD / METAL SEPERATED ON BOTH TIRES. *TR