TURNING A CORNER WHEN THE RIGHT FRONT TIRE COLLAPSED RESULTING IN THE TRUCK MAKING IMPACT WITH A CURB AT APPROX. 20 MPH. THERE WERE NO PHYSICAL SIGNS OF ANY FAILURE LEADING UP TO THIS POINT. REPORTED INCIDENT TO THE INSURANCE COMPANY AND THEY REPORTED IS WAS AN UPPER BALL JOINT FAILURE. TRUCK IS CURRENTLY BEING REPAIRED AND OLD PARTS ARE AVAILABLE. *TR