Shimano ULTEGRA CS-R8101 12-speed 11-34 tooth cassette

When developing the Ultegra R8100 series, Shimano took a holistic and 100% performance-oriented approach, because great speed means great responsibility. Faster than ever before, the 12-speed road bike groupset scores with unparalleled control and comfort anytime and anywhere - whether in an amateur race, on the hunt for a personal best time or on a companionable ride.

As with the Dura Ace R9200, Hyperglide+ is not only used in the Ultegra components, its Di2 components also rely on wireless technology to further simplify operation and ensure smooth shifting.

The Shimano Ultegra CS-R8101 cassette is characterized by seamless shifting operations that not only ensure quiet cruising, but also allow the rider to devote their full concentration to climbs and sprints. This is made possible by Hyperglide+ technology, which has already proven itself in the MTB segment with smooth shifting in both directions across the entire gear range.

Smooth upshifts and downshifts can be achieved even under maximum effort or in a direct duel with an opponent, while larger teeth maintain maximum efficiency. And the 12-speed cassette is even compatible with Shimano's previous 11-speed freehub bodies.

Compatible with mechanical and electronic (Di2) rear derailleurs

Hyperglide+ | Conventional Hyperglide technology ensures smooth upshifting thanks to small shifting ramps that guide the chain towards the next larger sprocket. Hyperglide+ adopts this function, but also applies it in the opposite direction to prevent the chain from dropping when shifting down. The result is smooth and consistent shifting in both directions, free from vibrations and without throwing off the cadence.

Compatibility:

Rear derailleur: RD-R9250, RD-R8150, RD-R7150 (11-34T only)
Chain: CN-M9100, CN-M8100, CN-M7100, CN-M6100