SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/tire-penny-test

How can a penny tell you a tire is too worn?

If you see all of Lincoln's head, replace the tire.

  1. If the tread covers Lincoln's head
  2. If you see all of Lincoln's head ✔
  3. If the tread reaches the top of the coin

Why: NHTSA says put a penny in the tread with Lincoln's head upside down. If you can see the top of his head, tread is at or below 2/32 inch. Replace the tire.

Huh, didn't know that: Tires also have wear bars. When tread is even with those bars, it is time.

The dad joke
Why did the car apply for a job? It wanted to drive success.
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Sources

  1. NHTSA: Tires https://www.nhtsa.gov/vehicle-safety/tires

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That's stuff everyone should know.