Shimano Altus Hyperglide 8-Speed Cassette (CS-HG31-8)

Description

Maximum Precise Shifting Performance

Whether you are grinding up gravel fire roads, cruising on a commuter e-bike, or keeping pace with everyday city traffic, your cassette configuration defines your drivetrain’s gear transition efficiency. The Shimano Altus CS-HG31-8 Cassette is engineered explicitly for riders who demand crisp, reliable gear steps and want to completely eliminate chain hesitations, missed indices, and excessive drivetrain noise during heavy pedaling loads.

Boasting Shimano’s legendary Hyperglide (HG) technology, this 8-speed cassette optimizes shift speed by utilizing computer-designed tooth ramps and contoured shift gates. Instead of the chain bouncing or riding up over the gear teeth during a shift, Hyperglide guides the chain smoothly and directly down to the next sprocket before it even leaves the previous one. To isolate your drivetrain from excessive rotational weight without sacrificing structural rigidity, the high-tensile steel cogs feature strategically enlarged cutout windows and drilled designs. This architecture keeps your acceleration feeling lightweight and highly responsive, managing chain engagement much more effectively than standard, solid-stamped alternative sprockets.

Technical Highlights

Hyperglide Shift Gates: Precision-engineered tooth configurations guide the chain seamlessly across cogs, delivering smooth shifting even when pedaling hard uphill.

Weight-Optimized Drilled Cogs: Features structurally reinforced cutouts across the sprocket bodies to shed mud and minimize overall component mass without introducing flex.

All-Weather Resilience: Finished with a protective black zinc phosphate treatment that shrugs off rain, trail mud, and road salt, shielding the steel cogs and lockring from premature corrosion.

Specifications