The DOT code
The tyre manufacturing date is included in the DOT code stamped on the tyre’s sidewall. Look for the word 'DOT' on the tyre profile. Some tyres have a DOT marking on both sides.
The DOT code is a marking required by the American Department of Transportation for all tyres sold in the United States. These days, it is generally also found on tyres sold in Europe.
Since 2000, the code is made up as follows:
- the 3 letters 'DOT'
- 2 groups of 3 to 4 characters to identify where the tyre comes from (tyre manufacturer and manufacturing plant)
- 4 numbers indicating the week and year the tyre was manufactured.
So to find the manufacturing date of the tyre, you just need to check the last 4 numbers of the code. For example, a DOT code which ends with 4015 tells us that the tyre was produced during week 40 of the year 2015.