US DOT Tire Identification Number (TIN)

This begins with the letters "DOT" and indicates that the tire meets all federal standards.The next two numbers or letters are are the plant code where they were manufactured, and the last four numbers represent the week a;nd year the tire was built. For example, the numbers 3197 means the 31st week of the 1997. The other numbers are marketing codes used at the manufacturer's discretion. This information is used to contact consumers if a tire defect requires a recall.