High-capacity Smart Cart features patented LOADSHIFT™ technology and is equipped with a unique push-slide-secure automatic locking system. Picking up tires is as easy as pushing the cart forward without the need for clunky foot pedals. It can handle up to 8 tires at once with the included frame extension. Moving heavy tires and wheels can now be a quick and safe process without unnecessary lifting. Compatibility with the Winntec Smart Disc and Wheel Assist add even greater functionality. Max tire diameter: 35in HOW THE SMART CART WORKS: 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. Tip the Smart Cart toward you – note the tilting-action. This allows for less stress on the technician. Use the Push / Pull Handle to remove the cart from the tire stack.