WHILE DRIVING AT 25 MPH SOMETHING IN THE FRONT END POPPED FOLLOWED BY THE LEFT FRONT TIRE SEPARATING FROM THE TRUCK. WHEN THIS OCCURRED VEHICLE SHARPLY PULLED TO THE LEFT AND COLLIDED WITH A POLE. VEHICLE WAS TOWED TO A TOWING YARD, THEN TO A BODY SHOP. THE BODY SHOP OR THE INSURANCE COMPANY COULDN'T INDICATE WHAT POPPED AND CAUSED THE TIRE TO SEPARATE. *AK