TREAD SEPARATION OCCURRED FOR REAR-PASSENGER SIDE TIRE WHILE TRAVELING AT 65 MPH. (DUNLOP GRANDTREK 265/70/R15) THE TIRE CAME AS ORIGINAL EQUIPMENT WITH THE SUV, IT WAS THE (FULL-SIZE) SPARE. THIS TIRE WAS MOUNTED ON THE REAR WHEEL A YEAR OR ABOUT 10,000 MILES AGO. THE VEHICLE SPUN OUT OF CONTROL AND CRASHED INTO THE CONCRETE BARRIER. *JB