Aha Trivia Stuff Everyone Should Know
Aha Trivia: Stuff Everyone Should Know · ahatrivia.com/mb-automotive-maintenance-0881922b2784

What does the lateral wear bar inside a tire tread show?

When the tire is worn out.

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  1. The tire's age in years
  2. When the tire is worn out ✔
  3. The tire's top speed

Why: The lateral wear bar indicator shows when tread has worn down to a point where the tire should be replaced.

Huh, didn't know that: The lateral wear bar indicator shows when tread has worn down to a point where the tire should be replaced.

The dad joke
When the bar shows up, it's time to retire the tire.
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References

Answer: When the tire is worn out. The lateral wear bar indicator shows when tread has worn down to a point where the tire should be replaced.

  1. Scouting America: Automotive Maintenance www.scouting.org/merit-badges/automotive-maintenance
    Explain the purpose of the lateral-wear bar indicator.
    Checked 2026-11-07.

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