What is a DOT code?

The DOT code on a tyre provides key details about the tyre’s manufacturing origin and date. These codes are present on all tyres and are helpful for safety, recall tracking, and age verification.

Interpreting a DOT code

Here’s how to interpret a DOT code.

  1. DOT Code:

    • The code typically begins with "DOT," indicating that the tyre meets U.S. Department of Transportation standards, which are recognised internationally.

  2. Manufacturer Plant Code:

    • The next two characters (letters or numbers) identify the factory where the tyre was produced. This helps track the tyre to its manufacturing location, which is valuable in case of recalls.
      (in this image: 1W)

  3. Tyre Size Code:

    • The following set of up to four characters specifies the tyre’s size and construction details.
      (in this image:889)

  4. Brand and Model-Specific Codes:

    • Additional characters may identify other specific manufacturer details, such as the tyre model or brand features.
      (in this image:059X)

  5. Production Date Code:

    • The last four digits are the most crucial for consumers, as they indicate the manufacturing date:
      (in this image 3223 - 32nd week of 2023)
      • The first two numbers show the week of the year (e.g., 01 for the first week).
      • The last two numbers indicate the year (e.g., 20 for 2020).

Checking the DOT code can help consumers make informed decisions about tyre safety and replacement schedules.

Where to Find the DOT code

The DOT code on a tyre is located on the sidewall, usually near the rim edge.

It can appear on either side of the tyre, but it’s often found on the inside sidewall (the side facing the vehicle). Sometimes, you may need to check both sides to locate it, especially if the code is only printed on one side.