PE00020, ORIGINAL EQUIPMENT ON 1997 FORD EXPLORER, P23575R15, WITH 40,000 MILESON THEM. WHILE DRIVING FRONT TIRE HAD A BLOWOUT. CHANGED TIRE WITH SPARE TIRE. KEPT TRAVELING AND REAR PASSENGER'S TREAD SEPARATED WHICH CAUSED A CRASH, AND 2 DEATHS. PLEASE PROVIDE FURTHER INFORMATION . *AK