This nickel-plated Shimano HG400 cassette is specifically designed for use with Super Narrow 9-speed HG chains. With a range of gear ratios, this cassette makes powering even the biggest wheels over a variety of terrain and climbs a breeze. It features molded shift gates for smooth shifting and drilled cogs to minimize weight without compromising strength and rigidity. A corrosion-resistant steel lockring holds the cassette securely. This is the ideal cassette for your 9-speed endeavors. Product specifications - Brand: Shimano - Model: HG400 - Material: Steel - Number of sprockets: 9 - Compatible chain: HG 9-speed - Gears: 9 - Type: Hyper Glide - Gear ratio: 11-25t