The XX SL Eagle Cassette from SRAM provides a new level of shifting performance, offering the best ever inboard and outboard shifting under load. With a full X-SYNC design the harder you pedal, the better it shifts, as well as being the lightest Eagle cassette SRAM has produced it also offers precision not seen before and a new level of durability.A whole new level of shifting performanceThanks to its full X-SYNC design, the harder you pedal, the better it shiftsThe lightest Eagle cassette in SRAM s historyUltra precise shifting and more durable than ever beforeNew generation fully machined hardened steel X-Done architecture for gears 1-9Ultra lightweight aluminium spider cog for gears 10-12Cassette and derailleur contact directly, ensuring perfect alignment on every bikeNot suitable for E-MTBMassive 520% (10-52) gear rangeNew-gen design is our lightest ever 10-52T cassette due to the ultra-lightweight, all-aluminium Spider CogFull X-SYNC for best-ever inboard and outboard shifting performance under load. Optimized gear steps on low end55mm chainline compatibility for more moderate chain angle, longer wear and greater precision. Setup Cog for fool-proof set up. Utilises well accepted and broadly available XD driver bodyThis new Generation Cassette has a hardened steel X-Dome design that covers gears 1-9 while a new ultra lightweight all-aluminium Spider Cog is used for gears 10-12. The highly impressive design doesn t end there however, as the XX Eagle Cassette and Derailleur contact directly which ensures perfect alignment on every bike. The massive 520% gear range is still jaw dropping and the 52 cog steps down with much improved progression with 44 and 38 cogs at the lower end (in comparison to the previous the Eagle 10-52 cassette). Lastly there is a clearly marked setup cog making installation really simple and fool-proof.Specification:Speed (CS): 12sGearing: 10-52tCog finish (Cassette): BlackTechnology (Cassette): XSCog sizes: 10-52t:10,12,14,16,18,21,24,28,32,38,44,52