Just as you start to hurt your feet after a long walk, so your car tires wear out every time you drive. This is not necessarily a sign of poor driving but rather an unavoidable fact of life. The tires wear out over time. And because a problem in your car tires while driving can be disastrous, and lead you to lose control of your car or leave you in the middle of nowhere, with no easy way to return to your home, it is useful you know when your tires are in poor condition so you can change them and buy new tires before something goes wrong.