Sram XG-1275 Eagle GX 12v Cassette

The X-DOME™ Eagle™ bicycle cassette designed for use with XD™ cages has 12 speeds and a 10-50T sprocket , offering 500% more gear range than a 2x center derailleur system while reducing weight significantly. This is due to the X-DOME™ architecture, which outperforms the strongest cassettes on the market. New gear features improve upshifting, downshifting and chain grip.