Shimano Ultegra CS-R8101-12-speed Cassette 11-34T

Offering seamless shifting, the Shimano Ultegra R8100 12-Speed Cassette lets you climb, sprint, and cruise without hesitation. Larger driving cogs maximize drivetrain efficiency and retain compatibility with both 11- and 12-speed HG-FREEHUB bodies.

HYPERGLIDE+ Technology
Building on Shimano’s revolutionary off-road system, HYPERGLIDE+ enables seamless up- and downshifts even under maximum pedaling force. Whether attacking a climb or racing a friend, your shifts remain smooth, fast, and precise.

Key Features:

• Refined 12-step gear combination for peak efficiency and acceleration
• Faster, smoother shifts under maximal pedaling load
• Compatible with 12-speed and 11-speed road FREEHUB bodies
• Retains Shimano’s hallmark durability and precision

Specifications:

• Gear Range: 11–34T
• Combination: 11-12-13-14-15-17-19-21-24-27-30-34T
• Type: HYPERGLIDE+
• Series: Ultegra R8100
• Average Weight: 345 g
• Compatible Chain: HG 12-Speed