Barring any irregular or unsafe wear patterns, the usual life of a tire is most often determined by the amount of tread left on it. Tires become unsafe and need to be replaced when they’re worn. Most people replace their tires once the tread is down to 1/16th of an inch.

All tires sold in the U.S. have tread wear bars. These are small raised bars found in your tire’s tread. They run between the tread blocks. As your tires wear, those bars will become flush with your tire’s tread. When this happens, it’s time to replace your tires.

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