With a wide assortment of ranges to choose from, the Shimano Ultegra R8000 11 Speed Cassette has got you covered for whatever terrain you like to challenge yourself on. As the closest-to-the-top level possible without being the top level, the Ultegra cassette is built with high-end techniques and materials. Using two carriers—one carbon and one alloy—the eleven steel cogs are machined with advanced profiles and weight-saving features. Shifting performance is flawless, exactly what you'd expect from the world's foremost drivetrain component manufacturer. The CS-R8000 cassette can be used with Shimano 11-speed Dura Ace, Ultegra, and 105 drivetrains.