Shimano Alivio HG51 8 Speed Cassette

The Shimano Alivio HG51 8 Speed Cassette is a high quality MTB cassette for narrow 8-speed Hyperglide chains. This Shimano bicycle cassette comes with Hyperglide (HG) sprockets that have a computer designed tooth configuration with contoured shift gates, which results in a smooth shift. The bike cassette also features a close ratio gearing, which delivers a more efficient use of energy through finer cadence control.

• Weigh 308g
• Nickel-plated finish for resistance to corrosion
• Corrosion-resistant steel cassette lock ring
• Cut-away sprockets to reduce the weight further without offsetting rigidity