Kassett Shimano CS-HG51 8-speed

The Shimano CS-HG51-8 is an 8-speed cassette on Alivio level. It has HyperGlide (HG) technology for precise and smooth shifting. It is designed for trekking and MTB. For 8-speed drivetrain systems Sprocket material: steel (chrome plated)Large sprocket cut-outs for low weight Comaptible with Shimano-spec freehubsCompatible with Shimano Road 11-speed with a 1.85 mm spacerChrome-plated lock ring Versions and gradations:11-28: 11-13-15-17-19-21-24-28 T11-30: 11-13-15-17-20-23-26-30 T11-32: 11-13-15-18-21-24-28-32 THYPERGLIDEIn combination with Hyperglide (HG) chains, HG sprockets ensure fast and responsive indexed shifting. HG sprockets have specially positioned shift ramps and tooth profiles that improve chain control during shifting. Fast, fluid and silent shifting is the result. Conventional sprockets cause the chain to ride up and over the gear teeth before engaging the sprocket. HG sprockets guide the chain quickly and directly to the next sprocket without override.