These are real tires complete with tubes, (when they go flat they can be repaired!!!) they fit the Beach Caddy Carts and WheelEEZ® Carts. They are made to traverse all types of terrain. They come in a set of two complete with a replacement axle. Replace your WheelEEZ® Cart tires to allow the cart to conveniently roll through a 3-foot door or gate, (standard width).