THIS IS AN INITIAL REPORT CONCERNING TIRE FAILURE ON TWO SEPERATE VEHICLES. I AM AN ILLINOIS STATE TROOPER. TODAY A FORD EXPLORER WAS INVOLVED IN A CRASH AS A RESULT OF THE TREADS COMING OF THE TWO REAR TIRES. I ALSO HAVE A PERSONAL VEHICLE WITH THE SAME. *AK( DOT NUMBER: TIRE SIZE: P235/75/R1 )