what is tread depth

Tread depth refers to the depth of the grooves in the rubber of a tire that make contact with the road or ground. As tires are used, the tread wears off, which limits its effectiveness in providing traction. In the United States, tire tread depth is measured in 32nds of an inch, and new tires typically come with 10/32” or 11/32” tread depths. The U.S. Department of Transportation recommends replacing tires when they reach 2/32”, and many states legally require tires to be replaced at this depth. To check tire tread depth, one can use the penny test, where a penny is placed between the tread ribs on the tire. If the tread does not cover Lincolns head, it is time to replace the tire. Another way to check tread depth is by using a tread depth gauge, which can be found at local auto parts stores. It is important to regularly measure the tread depth to ensure safety, as tires with insufficient tread depth can lead to reduced traction, longer braking distances, and impaired vehicle control.