what tread depth to replace tires

According to the U.S. Department of Transportation, tires need to be replaced when they reach 2/32” of tread depth. This is also the minimum legal limit for tire tread depth in the U.S. . However, many mechanics recommend replacing tires when they reach between 3/32” and 4/32” of tread depth, especially if you live in an area with severe climates to prevent hydroplaning and other inclement weather risks. Its important to note that even if parts of your tire tread are deeper than 2/32”, you should still replace the tire when any areas fail the penny test. Therefore, its recommended to have your tires inspected by a professional or to check them yourself using the penny test.