The CSM980 9AX-Box N is a lightweight mountain bike cassette with an 11-40T gear ratio. This cassette has 9 gears and a wide-ratio design, making it suitable for different sites. The gears are made of high-tensile steel with holes for weight savings. The cassette has a black finish and a weight of 500 grams. With the Fluid Drive Plus function, this cassette offers smooth switching and reliable performance. Product specifications: - Item number: CSM980 9ax-box n - Ean: 4710944253092 - Brand: SunRace - Model: CSM980 - Bike type: MTB - Net weight: 500 grams - Number of gears: 9 - Compatible body: Shimano - Gear ratio: 11-40 - Black color - Functions: Fluid Drive Plus - Material gears: high-tension steel with holes for weight savings