Tire mfg date code/sales
As far as I know there is no actual regulation on tire life. The tire manufacturers have pushed for it several times though. Below is a copy of a document I photographed at one of the major tire chains. I wanted some tires balanced and three major chains refused to balance them because they were six years old. They all originally told me it was due to federal regulation but when pressed they admitted that it was based on a recommendation from the Tire Manufacturers Association. One showed me this document as their basis.
As far as I know there is no actual regulation on tire life. The tire manufacturers have pushed for it several times though. Below is a copy of a document I photographed at one of the major tire chains. I wanted some tires balanced and three major chains refused to balance them because they were six years old. They all originally told me it was due to federal regulation but when pressed they admitted that it was based on a recommendation from the Tire Manufacturers Association. One showed me this document as their basis.
