SHIMANO Alivio 9-Speed 2-PCS Mountain Bicycle Crank Set – FC-M4050 Review Posted by GiantPandaisy July 12, 2018 in Drivetrain Components Front Chainwheel 9-speed Smooth/precise shifting performance with HYPERDRIVE technology 2-PCS Original Shimano parts guarantees that all components work perfectly – for optimum performance and maximum safety and longevity. Cycling Outdoor Recreation Parts & Components SHIMANO Sports & Outdoors