Shimano Cassette Sprocket Ultegra CS-R8101

The Shimano Ultegra CS-R8101 is a high-performance 12-speed cassette from the Ultegra R8100 series, featuring Hyperglide+ technology for faster, smoother, and more precise shifting under maximum pedaling force – even during aggressive sprints or climbs.

Refined gear combinations provide peak efficiency and seamless transitions across the range, with larger cogs for better drivetrain efficiency and compatibility with both new 12-speed and existing road 11-speed Hyperglide freehub bodies (HG spline L2). The lightweight alloy carrier reduces weight while maintaining rigidity, making it ideal for road racing, endurance rides, or high-performance training in variable Quebec conditions.

Available in two popular ratios: 11-30T (for flatter/fast roads) or 11-34T (for hilly/mixed terrain). Compatible with Shimano 12-speed chains and Di2/Mechanical groupsets (Ultegra R8100, Dura-Ace R9200 compatible).

• Model: CS-R8101 (Ultegra 12-speed)
• Speeds: 12
• Freehub: Shimano HG spline L2 (11/12-speed road compatible)
• Ratios: 11-30T (11-12-13-14-15-16-17-19-21-24-27-30) or 11-34T (11-12-13-14-15-17-19-21-24-27-30-34)
• Weight: ~291 g (11-30T) / ~345 g (11-34T)
• Features: Hyperglide+ for seamless shifts, lightweight alloy carrier, durable construction
• Use: Road/endurance bikes – race, training, long rides

Smooth, efficient, and race-proven – the perfect upgrade for precise shifting and speed!