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I was under the impression that the DOT date on a tire describes the week of the year it was created. I was told by a tire salesman however that the actual creation date is only known by the manufacturer and instead the DOT code provides information about the date the tire was certified in or the date it left the factory or something similar and that the actual date of manufacture is not told to them by the manufacturer (e.g. Michelin).

Is he trying to pull a fast one on me or something (although this actually works against him but w/e ).

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  • Quick google search : tirebuyer.com/education/how-to-determine-the-age-of-your-tires You need to improve your google-fu...
    – Solar Mike
    Jun 5 '19 at 12:12
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    How would you add the DOT number after manufacture? It is part of the moulded shape of the tire itself!
    – alephzero
    Jun 5 '19 at 12:39
  • @SolarMike I have obviously already viewed this page but getting the expected response made it even more suspicious and I wanted clarification.
    – PentaKon
    Jun 5 '19 at 13:52
  • If you always believe what a salesman says....
    – Solar Mike
    Jun 5 '19 at 14:28
  • @SolarMike I always question it but I am also not audacious to believe I always know better than them
    – PentaKon
    Jun 5 '19 at 14:43
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The DOT number shows the week, year and place of manufacture.

It is required by the US as part of their standards DOT is Department of Transport...

See enter link description here

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It's a manufacture date, not a certification date.

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