A tire change is the process of replacing a vehicle's tire with a new or spare one. This is often necessary when a tire is flat, damaged, or worn out. The process typically involves loosening the lug nuts, lifting the vehicle with a jack, removing the old tire, and then installing the new tire before tightening the lug nuts back in place. Changing a tire can be done at home or at a service station. It's important to have the right tools, such as a jack, a lug wrench, and a spare tire. Regularly checking tire condition can help prevent unexpected changes.