THE CONSUMER STATES THAT THE LEFT FRONT TIRE HAD A BLOW OUT AT 70 MPH. AFTERMARKET EQUIPMENT WAS INSTALLED AT 7,000 MILES, TIRE SIZE 165/70R14 AND THE DOT# UNAVAILABLE. *MR THE CONSUMER STATES THAT THE TIRES WERE OEM SWITCHED BY THE DEALER AT 4132 MILES. THE FIRST SET DEVELOPED LARGE BLISTERS ON THE INSIDE TIRE WALLS. THE CONSUMER WAS DRIVING ON A BRIDGE WHEN HE LOST CONTROL OF THE VEHICLE, AS A RESULT THE VEHICLE SWERVED TO THE LEFT, HIT THE GUARDRAIL WHICH CAUSED THE VEHICLE TO PING ACROSS THE HIGHWAY AND HIT AN EMBANKMENT, THEN THE VEHICLE ROLLED END OVER END SPINNING THE FRONT END THEN ROLLING DOWN THE EMBANKMENT 3 AND HALF TIMES LANDING ON THE PASSENGER SIDE. THE LEFT FRONT TIRE HAD BLOWN AND THE AIR BAGS DID NOT DEPLOY. *SCC