The is a lightweight design with 11 speeds. It has a metallic silver finish and weighs just 276 grams. With the super-smooth drive function, this cassette offers a smooth and efficient shifting experience. The gears are made of high-tensile steel and the spacer is aluminum (red anodized). This cassette is suitable for 11-speed systems and has 11-25T teeth. It's a reliable and durable part for your bike. Product specifications: - Lightweight design - Number of gears: 11 speed - Finish: metallic silver - Weight: 276 grams - Functions: super smooth drive - Gears material: high-tension steel - Spacer material: aluminum (red anodized)