The penny test (shown below) is the easy way to check a tire tread's depth when you don't have a depth gauge. If you place a ...

To monitor your tire’s tread depth, buy a tread-depth gauge from an auto parts store or simply use a quarter to judge whether the tires need replacing. If the top of George Washington’s head ...

Based on our tests of new and half-tread-depth tires, you may want to consider shopping for new ones on your car or truck closer to ... Stick a tread-depth gauge (about $5 at auto-parts stores ...