Amazon.com: Shimano Alivio M4000 - Plato de 9 velocidades FC-M4000 40T - Y1PL98050 : Deportes y Actividades al Aire Libre
Altus Rear derailleur offering Crisp Performance on- and Off-Road for 9-Speed drivetrains. Wide Link Design Increases Design and Service Life. 11-Tooth Pulleys for Reduced Pulley wear and Chain