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
| Age | Recommendation |
|---|---|
| 0-5 years | Ideal – full service life |
| 5-6 years | Acceptable – check condition regularly |
| 6-10 years | Caution – replacement recommended |
| Over 10 years | DO NOT USE! – dangerous |
Tips when buying tyres
- Always check DOT code before purchasing
- Avoid tyres older than 5 years (even new ones) – rubber loses its properties over time
- Be careful with "seasonal discounts" – often old stock is being sold
- 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!
