Shimano 105 CS-R7100 series 12-speed cassettes bring versatility to any rider or road. From sprinting on the flats to climbing steep inclines, these 11-34t cassettes have you covered Refined 12-step gear combination provides peak efficiency and accelerating performance for every situation Compatible with new 12-speed and road 11-speed freehub body Compatible with HG 12-speed chain For Di2 and Mechanical Shifting Systems Nickel plated finish Drivetrain Speeds: 12 Range: 11-34 Cassette Cogs: 11-12-13-14-15-17-19-21-24-27-30-34 Weight: 361g. Color: Silver