The Advent MX G-Series cassette is the smoothest shifting, most durable cassette that they've ever made. That all starts with SpeedRamp, a series of discrete shifting ramps that move the chain quickly, quietly, and precisely under load. The cogs themselves have been upgraded as well: the profile has widened to 1.8mm, and the first seven cogs (11-28) have been constructed using full chromoly steel, helping to outlast even the most robust competitors.SpeedRamp technology delivers faster, quieter shiftingThicker chromoly steel cogs from 11t to 28t provide a 500% durability increase over hi-tensile steel while the aluminum spider, 42t cog and 50t cog offer valuable weight savingsReplaceable small cogs extend service lifeNickel plated satin finish results in less visible wearCompatible with Advent MX onlyCompatible with standard HG cassette hub bodiesRated for E-bikesItem SpecificationsCassette Body TypeShimano HGCogs11-13-15-18-21-24-28-32-36-42-50ColorSilver/BlackDefined ColorBlackDefined ColorSilverDesigned for ebikeYesDrivetrain Speeds11Range11-50Weight485 microSHIFT Advent MX G-Series Cassette Cassettes EAN: 4710495438726