What do "DOT" numbers on tires indicate?

The "DOT" numbers on tires indicate the date of production and compliance with safety standards. This information is crucial for tire safety and reliability. The DOT code includes a series of numbers and letters that provide valuable details such as the plant code where the tire was manufactured, as well as a four-digit date code that represents the week and year the tire was produced. For example, if the last four digits of the DOT code are 2319, it signifies that the tire was manufactured in the 23rd week of 2019.

Understanding the DOT numbers is essential for consumers and professionals alike, as it helps to determine the age of the tire, which can affect performance and safety. Tires have a finite lifespan, and knowing when they were made is critical for assessing their suitability for use. Compliance with safety standards means that the tire has met certain minimum requirements set forth by the Department of Transportation, which is important for ensuring tire quality and safety on the road.