A wheel system consists of a circular object that rotates around an axle, allowing for the easy movement of vehicles and machinery. This design reduces friction and enables heavy loads to be transported with less effort. Common examples of wheel systems include bicycles, cars, and carts. The basic components of a wheel system include the wheel, the axle, and often a hub that connects the wheel to the axle. The interaction between these parts is crucial for stability and efficiency, making wheel systems essential in various applications, from transportation to industrial machinery.