Experience the ultimate in shifting performance with the Shimano Ultegra CS-R8101 12-speed cassette range. Designed for seamless gear transitions, this cassette allows you to climb, sprint, or cruise without hesitation. The larger driving cogs enhance drivetrain efficiency, ensuring compatibility with both Shimano 11 and 12-speed freehub bodies. Integrated Shimano HYPERGLIDE+ technology guarantees smooth and fast shifts across the entire gear range, providing an uninterrupted riding experience.Refined 12-step gear combination for peak efficiency in every racing scenarioFaster, smoother shifts even under maximum pedaling forceCompatible with both 12-speed and road 11-speed freehub bodies. This versatile cassette is perfect for riders seeking both performance and reliability, whether you are racing or tackling challenging climbs. Upgrade your ride with the Shimano Ultegra CS-R8101 and enjoy a new level of cycling efficiency.