TIRE BLEW OUT AT 70 MPH. HUSBAND WAS DRIVING THANK GOD, I WOULD HAVE ROLLED THE TRUCK. I HURT MY BACK WHILE BRACING MYSELF, MY CHILDREN WERE ALSO IN THE VEHICLE. THE DEALER TOLD US TO CALL FIRESTONE, FIRESTONE INSISTED NOTHING WAS WRONG WITH OUR TIRES. HE SAID HE COULD NOT TELL WHY THE TIRE BLEW OUT. HE ALSO SAID NOTHING WAS GOING TO BE DONE ABOUT IT.( DOT NUMBER: TIRE SIZE: 15R )