WE WERE DRIVING ON I-44 BETWEEN ADAIR, OKLAHOMA AND TULSA, OKLAHOMA. OUR TRAVELING SPEED WAS 75 MILES PER HOUR. WITHOUT WARNING THE LEFT REAR TIRE LOST ALL TREAD CAUSING OUR 1994 FORD EXPLORER TO FISH-TAIL OUT OF CONTROL. WE SLID OFF THE HIGHWAY AND HIT HIGHWAY MILE-MARKER SIGN 260. OUR EXPLORER CONINTUED TO SLIDE OFF THE HIGHWAY MISSING A GUARDRAIL BY LESS THAN 3 FEET. AT THE TIME, WE WERE SLIDING SIDEWAYS AROUND 40 MPH. HITTING THE GUARDRAIL WOULD HAVE PUT THE TRUCK INTO A END-OVER-END ROLL. MY WIFE, TWO KIDS AND MYSELF YOUR BLESSED TO HAVE MISSED IT. THE TRUCK CAME TO A STOP 150 YARDS LATER AND 40 YARDS DOWN A DITCH. THE FIRESTONE ATX TIRE THAT FAILED IS STILL COMPLETELY INFLATED JUST WITHOUT ANY TREAD. WE HAVE NOTIFIED FIRESTONE AND THEY WANT US TO SHIP THE TIRE TO NASHVILLE AT YOUR EXPENSE. IF THEY SHOW THE TIRE TO BE DEFECTIVE THEN THEY WILL REIMBURSE US FOR THE DEMAGE TO THE TRUCK ($5,000)PLUS THE SHIPPING COST OF THE TIRE.*AK( DOT NUMBER: )