A set of 203mm Aluminium Mecanum wheels Basic (Bearing type rollers) is a heavy duty wheel. Each wheel is comprised of a series of rollers, mounted so that their axis of rotation is 45° to the axis of the main wheel. As the wheels rotate in sync, the vehicle moves forwards or backward normally, but by spinning pairs of wheels in opposite directions, the rollers enable sideways movement. Put it all together, and you can move laterally, diagonally, or spin in a circle. The set of 203mm mecanum wheels includes 2 left wheels and 2 right wheels. You can also use universal hubs to connect the wheels and motor. All of you need to do is to add your drive motor, controller boards, and batteries. Moving all four wheels in forward and backward cause direction causes the robot to move in forward and backward. Running wheels opposite to each other on each side causes the robot to move in a lateral way without changing orientation. Other speeds and direction combinations cause the robot to move in different directions. The main advantage of the Mecanum wheels above Omnidirectional wheels is that all four wheels contribute force when the robot is moving in forward, backward, left or right direction without changing orientation. Package Includes: 2 x 203mm Aluminium Mecanum wheels Basic (Bearing type rollers) Left 2 x 203mm Aluminium Mecanum wheels Basic (Bearing type rollers) Right SKU: PGI-002694 Category: MECANUM WHEELS