PE00020; TIRE TREAD SEPARATION: WHILE DRIVING ABOUT 70 MPH, TREAD ON PASSENGER'S SIDE TIRE CAME OFF. DRIVER WAS ABLE TO PULL OVER ON THE SIDE OF THE ROAD. ONE OTHER PASSENGER IN THE TRUCK. NO ONE WAS INJURED. TIRE SIZE P23575R15, DOT # W2HL1PY067, ORIGINAL TIRE EQUIPMENT. FIRESTONE WAS NOT CONTACTED ABOUT THE TIRE. DRIVER JUST THOUGHT THE TIRE EXPLODED AND CONTACTED AAA.*AK