microSHIFT Advent MX G-Series Cassette - 11-Speed 11-50t Aluminum Spider Silver/BLK For HG Driver

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.