DOT code: how to check tyre age?

What is DOT code?

DOT code (Department of Transportation) is a four-digit marking on the tyre sidewall that indicates the exact manufacturing date. This code is mandatory for all tyre manufacturers.

How to read DOT code?

DOT code consists of 4 digits located in an oval frame:

• First 2 digits = week number (01-52)
• Last 2 digits = year

Example: DOT 2823

• 28 = 28th week (mid-July)
• 23 = 2023

This tyre was manufactured in mid-July 2023.

Where to find DOT code?

DOT code is always on the tyre sidewall. Sometimes it is visible only on one side, so you may need to check both sides.

Why tyre age matters?

Even unused tyres age. Rubber over time:

• Loses elasticity and hardens
• Develops micro-cracks
• Decreases grip on road surface
• Increases risk of blowout

⚠️ Recommended tyre age limits

Tips when buying tyres

• Always check DOT code before purchasing
• Assess the DOT date alongside storage conditions, tyre condition and manufacturer guidance – the manufacture date alone does not establish whether a tyre is fit for use
• When buying in a seasonal sale, check the stated DOT and ask about storage conditions – the discount itself does not indicate tyre condition
• Buy from trusted sellers who specify manufacturing date

Conclusion

Checking DOT code takes just seconds but can save your life. Always choose fresh tyres and never compromise on safety!

🔢 DOT Code Calculator