PE02000, TIRE TREAD SEPARATION: WHILE DRIVING AT 70 MPH TREAD ON THE REAR PASSEGNER'S SIDE TIRE CAME OFF. DRIVER LOST CONTROL OF VEHICLE, AND VEHICLE SPUN AROUND, AND HIT A GUARDRAIL. DRIVER WAS THE ONLY PERSON IN THE VEHICLE, AND WAS NOT HURT. TIRE WAS A FIRESTONE, WILDERNESS, ORIGINAL EQUIPMENT. FIRESTONE HAS NOT BEEN CONTACTED ABOUT THE TIRE. PLEASE PROVIDE INFORMATION ABOUT INCIDENT IN NOVEMBER OF 1998. *AK