What is the minimum safe tire tread depth?
Quick Answer
The minimum legal tire tread depth in most states is 2/32 of an inch. A simple test: insert a penny into the tread groove with Lincoln's head down. If you can see the top of Lincoln's head, the tread is too worn. Replace tires before reaching the minimum for better safety.
Explanation
The minimum legal tire tread depth in most states is 2/32 of an inch. A simple test: insert a penny into the tread groove with Lincoln's head down. If you can see the top of Lincoln's head, the tread is too worn. Replace tires before reaching the minimum for better safety. Understanding this concept is essential for safe driving and will help you answer similar questions on the DMV written test.
Why This Matters on the DMV Test
Questions about Safe Driving are among the most common on the permit test. Knowing the correct answer helps you pass your exam and stay safe on the road. Most states require a score of 70–83% to pass.
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