I BRAKED AND SWERVED TO AVOID HITTING A METAL TANK THAT JUST FELL OFF A TRAILER IN FRONT OF ME, HIT THE TANK ON THE RIGHT FRONT, THEN DISCONTINUED BRAKING. THEN THE RIGHT FRONT, LEFT FRONT, AND RIGHT REAR TIRES COLLAPSED OFF THE RIMS. I LOST CONTROL OF THE CAR, SWERVED INTO THE MEDIAN/DITCH, CAR TURNED 180 DEGREES AND ROLLED BACK (ALMOST ROLLED OVER). CAR SUSTAINED SIGNIFICANT BODY AND UNDERCARRIAGE DAMAGE. DUE TO SEAT BELT USAGE, MY PASSENGER AND I SUSTAINED MINOR INJURIES ONLY. I WAS TRAVELLING 50 MPH ON A 4-LANE DIVIDED HIGHWAY. WEATHER WAS 90 DEGREES, SUNNY, AND DRY. IF THE TIRES HAD NOT FAILED, I WOULD HAVE HAD MINOR BODY DAMAGE ONLY. COMPLETE DOT NUMBER IS BFRWTU410202.*AK