Blueish gray classic car front passenger side fender showing a white wall tire with a red ring and a wheel in a driveway

Don't Be Fooled by Tread: The Importance of Tire Date Codes

We all know the importance of checking our tire tread. But how many of us actually pay attention to the little code stamped on the sidewall? That seemingly insignificant string of numbers, the tire date code, holds crucial information about your tires' age and safety, and ignoring it could be a costly and potentially dangerous mistake.

What is a Tire Date Code?

The tire date code, also known as the DOT (Department of Transportation) code, is a series of numbers and letters molded into the sidewall of your tires. The last four digits of this code reveal the tire's manufacturing date.

  • The first two digits: Represent the week of manufacture.
  • The last two digits: Represent the year of manufacture.

For example, a code ending in "2024" means the tire was manufactured in the year 2024. A code ending in "3523" means the tire was made in the 35th week of 2023.

Why Does Tire Age Matter?

Even if your tires have plenty of tread, age can significantly impact their performance and safety. Here's why:

  • Rubber Degradation: Over time, the rubber compounds in tires break down due to exposure to UV rays, temperature fluctuations, and ozone. This degradation can lead to cracking, hardening, and reduced grip, even if the tires appear visually sound.
  • Reduced Traction: Aged tires lose their ability to grip the road, especially in wet or icy conditions. This increases the risk of hydroplaning and skidding.
  • Increased Risk of Blowouts: Degraded rubber is more susceptible to blowouts, which can have catastrophic consequences, especially at high speeds.
  • Hidden Damage: Tires may look fine on the outside, but internal damage caused by age can be difficult to detect.

How Old is Too Old?

While there's no single magic number, many tire manufacturers and safety organizations recommend replacing tires that are six to ten years old, regardless of tread wear.

  • Six Years: Some manufacturers recommend a thorough inspection after six years of service.
  • Ten Years: Many recommend replacement after ten years, even if the tread looks good.

It's crucial to remember that these are general guidelines. Factors like climate, storage conditions, and driving habits can affect a tire's lifespan. Tires in hot, sunny climates tend to degrade faster than those in cooler regions.

Where to Find the Tire Date Code:

The DOT code is usually located on the tire's sidewall. Look for either the letters "DOT" followed by a series of numbers and letters. The last four digits are the ones you're interested in.  Or look for a raised shape with four letter inside of it like the red circle in the picture shows.

Tire sidewall with manufactured date code circled in red


What to Do:

  • Check Your Tires Regularly: Inspect your tires for tread depth, damage, and the date code.
  • Replace Old Tires: If your tires are approaching or exceed the recommended age limit, replace them, even if they appear to be in good condition.
  • Buy Fresh Tires: When purchasing new tires, check the date code to ensure you're getting relatively new tires.
  • Consider Storage: If you store tires, do so in a cool, dry place away from direct sunlight and ozone sources.

By paying attention to your tire date codes, you can ensure your safety and the safety of others on the road. Don't let old tires put you at risk. Take the time to check your tires today!

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