Shimano CS-HG51 8 Speed Cassette

SHIMANO ALIVIO - 8-Speed - HYPERGLIDE - Cassette Sprocket

Offered in a wide range of road gearing, the HG51-8 cassette is perfect for 8-speed road drivetrains.

High quality 8-speed cassette
Hyperglide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load
Close ratio gearing allows a more efficient use of energy through finer cadence control
Sprockets are cut away to further reduce weight without reducing rigidity
Nickel-plated finish offers hard wearing resistance to corrosion
Corrosion-resistant steel cassette lockring
For 8-speed HG chains

TECHNOLOGIES

The distinctively designed HYPERGLIDE sprockets incorporate specially positioned shift ramps and tooth profiles for improved chain control during shifting. Fast and responsive indexed shifting is the result.
The HG cassette sprocket, underwent comprehensive optimization to achieve super-highly efficient shifting.

HG sprockets

Guide the chain quickly and directly to the next sprocket without override.

Conventional sprockets

Cause the chain to ride up and over the gear teeth before engaging the sprocket.