The DOT code is one of the most important markings on a tyre, as it indicates the date of manufacture. It helps assess the tyre’s age and make an informed decision about purchase and use.
Where to find the DOT code
The DOT marking is located on the tyre sidewall. The most important part is usually the last four digits, as they indicate the production week and year.
How to read it
For example, the code 3903 means the tyre was manufactured in the 39th week of 2003. The first two digits represent the week, and the last two digits represent the year.
Is an older tyre always bad
No. Tyres that have been properly stored can retain good properties for several years after production. It is important to consider not only the age, but also storage conditions, visual condition, and tread.
When age becomes important
The older the tyre, the more important it is to pay attention to its condition. Very old tyres, especially those over 10 years old, are generally recommended to be replaced even if the tread is not fully worn.
What to check in addition to the DOT code
- tread depth
- sidewall damage or cracks
- uneven wear
- pressure loss or deformation