PE00 020; CONSUMER WAS TRAVELING ABOUT 40MPH ON A STATE ROAD AND VEHICLE STARTED PULLING TO RIGHT, AND SHE PULLED OVER TO THE SHOULDERS. LEFT FRONT DRIVER'S SIDE TIRE. TIRE TREAD HAD SEPARATED FROM WHEEL. TOOK VEHICLE TO A TIRE PLACE TO HAVE THEM INSPECTED. TIRE MECHANIC TOLD HIM THAT THE TIRE WAS NOT FIXABLE. TIRES WERE FIRESTONE #ATX. *AK