The term "rear wheels" refers to the two wheels located at the back of a vehicle, such as a car or truck. These wheels are responsible for providing traction and helping to steer the vehicle when it is in motion. The rear wheels are powered by the engine through a drive shaft and differential, which allows them to rotate independently of each other, enabling better control while turning. In some vehicles, such as those with four-wheel or all-wheel drive systems, the front and rear wheels work together to provide power and traction for improved handling in various road conditions.