SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/dad-tire-tin-date

On a tire's TIN, what do the last four digits tell you?

The week and year the tire was made.

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  1. The tire's maximum speed and load
  2. The tread depth when new
  3. The week and year the tire was made ✔

Why: NHTSA says the last four digits of the Tire Identification Number show the week and year the tire was made. A code like 2325 means week 23 of 2025.

Huh, didn't know that: NHTSA notes some vehicle and tire makers recommend replacing tires that are 6 to 10 years old, regardless of tread.

The dad joke
Astronomers got tired watching the moon go around the earth for 24 hours. They decided to call it a day.
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References

Answer: The week and year the tire was made. NHTSA says the last four digits of the Tire Identification Number show the week and year the tire was made. A code like 2325 means week 23 of 2025.

  1. NHTSA: Tires www.nhtsa.gov/vehicle-safety/tires
    The last four digits of the TIN indicate the week and year the tire was made.
    Checked 2026-10-10.

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