75mm Robot Wheel for BO Motors is a circular component that is intended to rotate on an axial bearing. The wheel is one of the main components of the wheel and axle which is one of the six simple machines. Wheels, in conjunction with axles, allow heavy objects to be moved easily facilitating movement or transportation while supporting a load, or performing labor in machines. Features The car hub is reinforced nylon, very sturdy. The tire is made of low-quality rubber for a non-slip effect. Good load capacity and greater ability to grip Robot Wheel Material: Plastic Rubber This wheel is compatible with BO motors Only. These wheels come in different colors.