PE00 020; CONSUMER WAS TRAVELING ABOUT 60MPH ON HIGHWAY AND HEARD A NOISE. HE FELT THAT REAR WENT DOWN. HE WAS ABLE TO PULL OVER TO SHOULDER, AND NOTICED THAT LEFT REAR DRIVER'S SIDE TIRE TREAD HAD SEPARATED FROM RIM. FIRESTONE TIRE, FR690. HE HASN'T CALLED FIRESTONE. *AK