All tyres feature a production date. This helps to ensure that your tyres are not too old. That said, tyres can have a long life span if they are correctly stored. The DOT number indicates the production date. The side of the tyre features a 4-figure number (which is preceded by the abbreviation ‘DOT’). These four figures refer to the production date: The first two figures identify the week (from 01 to 52) and the last two the year of production