Shimano Ultegra CS-R8101 12-speed 11-30T cassette.

The seamless shifting of the ULTEGRA R8101 12-speed cassette allows the rider to concentrate fully on climbs, sprints or enjoyable cruising without having to worry about the next shift. Sprockets with more teeth provide greater drivetrain efficiency and ensure compatibility with SHIMANO 12-speed FREEHUB freehub bodies. HYPERGLIDE+ cassettes set new standards for off-road shifting thanks to seamless upshifts and downshifts across the entire gear range. The time has come for this technology to be used on road bikes too. Shifting is now possible even when applying maximum force on climbs or in a direct duel with an opponent. Despite their expansion to 12 gears, ULTEGRA CS-R8100 cassettes set new standards for road bike shifting systems.

Product specifications:

• MODEL NUMBER: CS-R8101-12
• GROUP: ULTEGRA R8101 groupset
• Average weight: 291 (11-30T)
• Kombination: 11-12-13-14-15-16-17-19-21-24-27-30Z
• Combination designation (group designation): 11-30Z
• Type: HYPERGLIDE+