Fun Fact: Almost every state mandates a minimum tire tread depth of 2/32 of an inch for passenger car tires, as measure from the top of a tread wear indicator to the top of the tread. The wear indicator will appear in the tread grooves as a small bump. It just so happens that the lettering over Abe Lincoln’s head on a penny is exactly 2/32 of an inch tall. To make sure you have legal tread depth, grasp a penny with Abe Lincoln upside down, find a wear indicator, and place the penny on top of the indicator. If you can see the letters, you have insufficient tread and should replace your tires.
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