The new Eagle X0 Cassette offers a new industry leading shifting performance, giving you the best inboard and outboard shifting under load. It has been engineered as integrated and interdependent components, the X0 Eagle Transmission Cassette and derailleur contact directly, ensuring perfect alignment on every bike.Full X-SYNC for best-ever inboard and outboard shifting performance under loadOptimised gear steps on low end55mm chainline compatibility for more moderate chain angle, longer wear and greater precisionSetup Cog for fool-proof set upFeatures X-DOME with a lighter aluminium 12th gearFully E-MTB approvedThis new Cassette from SRAM has  a unique and stunning Dark Polar finish that will really enhance the look of your bike. But beyond that the cassette deliver incredible performance, starting with the nickel plating which gives incredible corrosion & wear resistance. The X-Sync design means that the harder you pedal the better the shifting performance. A mark of its incredible strength is proven by the fact its fully approved for E-MTB use.Built for a 55mm chainline for even more durability and precision thanks to milder chain angles throughout the full range, low to high. From its massive 520% gear range, the 52 tooth cog steps down with improved gear progression with 44 and 38 tooth cogs in the low end (compared to the Eagle drivetrain 10-52-tooth cassette). What else It has a clearly marked Setup Cog, making install both simple and fool-proof.Specification:Speed (CS): 12sGearing : 10-52tCog finish (Cassette): BlackTechnology (Cassette): XSCog sizes: 10-52t:10,12,14,16,18,21,24,28,32,38,44,52Weight Based On: Engineering EstimateWeight (g): 376