These sprocket hubs are designed to carry the sprocket and drive train to rotate on the axle of the go-kart. Choose:
50mm Sprocket Hub for MGM Espionage and other chassis with 50mm axle.
40mm Sprocket Hub for MGM Espionage and other chassis with 40mm axle.
30mm Sprocket Hub for MGM Cadet chassis and other chassis with 30mm axle.
