How to Read a DOT Tire Code (And Why It Matters)

Thinking about replacing your tires? As most people know, tire tread wear is a critical consideration. But the age of the tires can make a difference too. Over time, the rubber in tires deteriorates from UV and environmental exposure, which leaves tires brittle. This can lead to sidewall damage and eventual tire failure.

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To prevent tire failure, the Department of Transportation recommends replacing your tires every ten years. Most tire manufacturers recommend doing so every six. No matter which suggestion you choose to follow, knowing the age of your tires is important. It’ll help you decide when it’s the right time to swap them out.

The key to learning the age of your tires is in the DOT code, located on the sidewall of each tire. These follow a shared code across manufacturers and brands as required by the Department of Transportation. They begin with the letters DOT, followed by a series of eleven or twelve numbers/letters that indicate the manufacturing location, tire size, manufacturer’s code, and age of the tires. Here's an example:

DOT 73C2 KLH0913

To determine the tire’s age, look at the last four numbers of the code. In our example, 09 13 stands for the week and year the tire was made. In this case, the tire was made in the 9th week of 2013.

Knowing the age of your tires will help you decide when to replace your tires, and keep your driving safe and smooth.

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