The Winntec Smart Cart is the best way to transport heavy tires and wheels around the shop. With its spring-loaded arms and no foot pedals, grabbing and releasing tire stacks couldn't be easier. HOW THE SMART CART G471147HD WORKS: 1. Simply push the Smart Cart toward the stack of tires and watch as the spring-action arms grasp the tires without the need for cumbersome pedals, levers, or gas springs. 2. Tip the Smart Cart toward you, note the tilting-action. This allows for less stress on the technician. 3. Use the Push / Pull Handle to remove the cart from the tire stack.