The CSM980 9AX-BOX N is a lightweight mountain bike cassette with a gear ratio of 11-40T. This cassette has 9 gears and a wide ratio design, making it suitable for various terrains. The sprockets are made of hi-tensile steel with holes for weight saving. The cassette has a black finish and weighs 500 grams. With the Fluid Drive Plus feature, this cassette offers smooth shifting and reliable performance. Product specifications - Article number: CSM980 9AX-BOX N - EAN: 4710944253092 - Brand: SunRace - Model: CSM980 - Bicycle type: Mountain bike - Net weight: 500 grams - Number of sprockets: 9 - Compatible body: Shimano - Sprocket ratio: 11-40 - Color: Black - Features: Fluid Drive Plus - Sprocket material: Hi-tensile steel with holes for weight saving