Shimano Alivio CS-HG51-8 – 8-Speed Hyperglide Cassette, 11-28T
The Shimano Alivio CS-HG51-8 is an 8-speed Hyperglide cassette designed for smooth, reliable shifting on compatible bicycle drivetrains. Its 11-28T gear range features closely spaced ratios, making it an excellent replacement option for everyday cycling, commuting and recreational rides.
Shimano Hyperglide sprocket technology helps guide the chain efficiently between gears, while the steel sprocket construction provides dependable durability.
Key Features
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8-speed cassette: Designed for compatible 8-speed shifting systems.
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11-28T gear range: Closely spaced ratios for smooth cadence changes.
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Hyperglide technology: Specially shaped sprockets help provide reliable shifting.
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Shimano HG mounting: Fits compatible HG splined freehub bodies.
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Steel sprockets: Durable construction for regular use.
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HG/IG chain compatibility: Works with compatible Shimano 6-, 7- and 8-speed chains.
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Versatile application: Suitable for compatible road, hybrid, urban and mountain bicycles.
Technical Specifications
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Brand: Shimano
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Model: CS-HG51-8
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Product type: Rear cassette
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Rear speeds: 8
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Gear range: 11-28T
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Individual sprockets: 11-13-15-17-19-21-24-28T
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Shimano sprocket combination: BF
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Technology: Hyperglide (HG)
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Mounting interface: Shimano HG splined freehub
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Sprocket material: Steel
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Compatible chains: Shimano HG/IG 6-, 7- and 8-speed
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Application: Compatible road, hybrid, urban and mountain bicycles
Smooth Hyperglide Shifting
Shimano Hyperglide technology uses carefully shaped sprockets to support smooth chain movement between gears.
Combined with compatible shifters, derailleurs and chains, the CS-HG51-8 offers dependable shifting for everyday riding.
Closely Spaced 11-28T Gearing
Compared with the 11-32T version, the 11-28T cassette offers smaller jumps between several gears, helping riders maintain a consistent pedaling cadence.
Its eight sprockets are arranged as follows:
11 – 13 – 15 – 17 – 19 – 21 – 24 – 28T
The 28-tooth largest sprocket provides a lower gear for moderate climbs, while the 11-tooth smallest sprocket offers a higher gear for faster riding.
Compatibility
The CS-HG51-8 mounts onto compatible Shimano HG splined freehub bodies and requires a suitable 8-speed shifting system.
Check the rear derailleur's supported sprocket range, total capacity and chain compatibility before installation.
This product is a cassette, not a threaded freewheel, and cannot be mounted directly onto a screw-on freewheel hub.
Installation and Maintenance
Use the appropriate cassette installation tools and follow the manufacturer's recommended lockring tightening torque.
When replacing a worn cassette, inspect the chain for wear to maintain reliable shifting.
Note: This product is the Shimano CS-HG51-8 cassette in the 11-28T BF configuration.
