ON MY WAY BACK FROM MT RUSHMORE ON JULY4 ON I90 E TO ST PAUL, MN , SOMETHING HAPPENED RESULTING IN STEERING PULL, TIRE OVERHEATING AND EVENTUALLY THE TIRE LAYERS CAME OFF HITTING THE FENDERS & BUMPERS CAUSING SOME DAMAGE..I SUSPECT THE PROBLEM MAY BE RELATED WITH TIRE STEM..FORTUNATELY THERE WERE NO MAJOR CASUALTIES...I STILL FEEL HORRIFIED BY THE INCIDENT..SOMETHING MUST BE DONE TO AVOID SUCH INCIDENTS..