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 freehubs
Compatible with Shimano Road 11-speed with a 1.85 mm spacer
Chrome-plated lock ring
Versions and gradations:
11-28: 11-13-15-17-19-21-24-28 T
11-30: 11-13-15-17-20-23-26-30 T
11-32: 11-13-15-18-21-24-28-32 T
In 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.