Struts and wheels are the portion of the wheelchair that dictate the height. Wheel size is chosen based mainly on the patient’s weight. These wheels have dense foam along the inside, and are coated in a durable rubber outer layer for long-lasting wear. The struts are adjustable in half-inch increments with push buttons that set the height on the leg of the frame. This item ships as a set of two with each strut and wheel pre-assembled.