Sram: FREEDOM The X-DOME™ Eagle™ cassette has no peer. It buried the last dangling shred of an argument in favor of a mountain bike front derailleur. And now, it’s 10-50 tooth gear range has open the door for an entire ecosystem of Eagle™ groupsets. Designed for use with our proven, reliable XD™ driver body, this 12-speed, cassette offers an optimal 500-percent gear range. In independent tests the X-Dome™ architecture is proven to yield the strongest cassette on the market. New shifting characteristics improve both inboard and outboard shifting, as well as chain retention. This cassette matches up perfectly in performance and color to XX1 Eagle AXS™ enabled componentry.FEATURESNew copper colorway is perfectly matched to work with XX1 Eagle AXS™SRAM’s cassette manufacturing technology provides the greatest durability and lightest weightAll-new shifting features create a smoother, quieter system with enhanced inboard and outboard shift performanceXD™ driver body compatible SPECIFICATIONSSpeed (CS): 12sGearing: 10-50tCog finish (Cassette): CopperTechnology (Cassette): XGCog sizes: 10-50t:10,12,14,16,18,21,24,28,32,36,42,50Driver body interface: XD