This SunRace cassette ratio is suitable for mountain bikes with 11-speed gears. The CSMS8 model has a wide ratio and uses fluid-plus drive technology for smooth circuits. The 11-46T Tand combination ensures a wide gear range. The cassette is made of high-quality materials, with an aluminum spider, spacer and anodized knoskrans. The dental crowns are made of Hi-Enile steel and finished in metallic silver. With countersunk holes for weight reduction, this cassette weighs just 534 grams. Product specifications: - Model: CSMS8 - Gears: 11 (wide ratio) - Function: Drive Fluid Plus - vertu: 11-46T -The combination: 11-13-18-21-24-28-32-36-40-46 - Material: - spider, spacer and knoskrans: aluminum / black anodized - Dental crowns: hi-enile steel - Finish: metallic silver - free holes for weight reduction: yes - Weight: 534 grams