Kart racing, commonly known as karting, is a form of motorsport using small, open-wheel, four-wheeled vehicles known as go-karts or racing karts. Kart races are usually held on dedicated kart circuits, although some forms of karting, including superkart racing, also take place on full-size motor racing circuits. Karts vary widely in speed and specification, from recreational rental karts to high-performance racing karts.