Shimano Acera CS-HG41 Cassette

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.
Features:
Gearing gives a low sprocket making it easier to climb even the steepest of hills.
Sprockets are cut away to reduce weight without reducing rigidity
Nickel-plated finish offers hard wearing resistance to corrosion
Corrosion-resistant steel cassette lockring
For 8-speed HG chains