Do car wheels refers to the four wheels of a car that are aligned in order to ensure the vehicle runs smoothly. Aligning the wheels is an important part of car maintenance, as it ensures the car is running safely and efficiently. Aligning the wheels involves adjusting the angles of the wheels so that they are parallel to each other and perpendicular to the ground. This helps to reduce wear and tear on the tires, as well as improve the car's handling and fuel efficiency.