SHIMANO HG51 8-Speed Cassette Review Posted by Pelicandy October 22, 2018 in Drivetrain Components 8-Speed Precise and consistent HyperGlide shifting performance. Long leg spacer for further weight reduction. Enlarged sprocket window design for lighter weight. Random Products Contrast Dog Fang Bike Chain Drop Guide – Bl... SHIMANO ALFINE Single Gear w/Chain Tensioner ̵... Cycling Bicycle Frame Chain Protector Outdoor Spor... Seattle Sports Drivetrain Cover Review Cycling Outdoor Recreation Parts & Components SHIMANO Sports & Outdoors