1986 Chevrolet Pick Up C&K Series

A PURCHASE OF 4 FIRESTONE R4S TIRES WAS MADE FOR MY 1986 CHEVY PICK-UP FROM THE TINLEY TEE TIRE COMPANY OF DEMING, NM. A FEW MONTHS AFTER THE PURCHASE TWO OF THE TIRES SEPERATED AND WERE REPLACED WITH A PARTIAL WARRANTY FROM FIRESTONE. A FEW MONTHS LATER THE OTHER TWO ORIGINAL TIRES SEPARATED AND WERE REPLACED WITH A PARTIAL WARRANTY FROM FIRESTONE. ALMOST ONE YEAR LATER ANOTHER TIRE SEPERATED AND ONE WENT OUT OF ROUND. AT THIS POINT I DIDN'T WANT A REPLACEMENT, I WANTED A REFUND. TINLEY TEE TIRE COMPANY SAID NO AS DID FIRESTONE SO I WENT AND BOUGHT ANOTHER BRAND OF TIRE SOMEWHERE ELSE. ALL SEPERATIONS OCCURED AT SPEEDS BETWEEN 65 AND 75 MPH. MORE ACCURATE DATES CAN BE OBTAINED WITH SOME RESEARCH AND I DO HAVE THE LAST FOUR TIRES; ONE SEPERATED AND ONE OUT OF ROUND.( DOT NUMBER: )