The British Rubber Manufacturer Association strongly recommends NOT to drive with tires older than 6 years.
Ford Motor has asked the federal government to implement ban on tires older than 6 years.
But the tire industry lobby in the U.S. has been strong and does not recognize this 6-year term.
Watch the news piece, which starts with a tragic accident, where two young men boys died because the tires on their vehicle were actually 9 years old, although the father of one of the boys thought the tires are only 5 years old.
tire = tyre (US English < -> British English)