Road Cassette Shimano Ultegra CS-R8101 12v

Optimise your road performance with the Shimano Ultegra CS-R8101 12v, a top-of-the-range cassette designed for demanding riders looking for smoothness, precision and efficiency. Part of the renowned Ultegra range, it incorporates the latest innovations from Shimano to deliver a fast, reliable drivetrain, even under heavy use.

Thanks to Hyperglide+ technology, this 12-speed cassette guarantees ultra-smooth gear changes, even when revving up or climbing hard. You can shift gears without releasing pressure on the pedals, ensuring continuity of effort and a noticeable gain in efficiency on all types of terrain.

Designed with versatility in mind, the R8101 offers optimised gear ratios (11-30 or 11-34 teeth) that combine speed, power and comfort, whether on the plains or in the mountains. The design combines high-strength steel sprockets and aluminium carriers, offering an excellent compromise between durability, lightness and rigidity.

Compatible with Shimano 12-speed drivetrains, whether mechanical or electronic, it also adapts to Shimano HG 11 and 12-speed freewheel bodies, making it easy to install without constraint.

Key features:

• Smooth, precise 12-speed transmission

• Hyperglide+ technology for shifting under load

• Versatile ratios (11-30 / 11-34)

• Compatible with mechanical and Di2 drivetrains

• Excellent durability thanks to premium materials

Ideal for :

Road cyclists looking for a high-performance, reliable cassette that's suited to all course profiles, from intensive training to competition.

? With the Shimano Ultegra CS-R8101 (equivalent to the R8100 cassette), enjoy a smoother, faster and more efficient pedalling experience, ride after ride.

Technical specifications

- 12-speed cassette
- 11-tooth output
- Steel
- Hyperglide +
technology - 11/30 and 11/34 teeth
- Spacing: 11/30: 11-12-13-14-15-16-17-19-21-24-27-30 and 11/34: 11-12-13-14-15-17-19-21-24-27-30-34T
- Weight 11/30 294 gr and 11/34: 345gr (manufacturer)
- Brand Shimano

FAQ - Cassette Shimano Ultegra CS-R8101

Q : Is this cassette compatible with all Shimano 12-speed derailleurs?
A : Yes, it is compatible with Shimano Ultegra and Dura-Ace 12-speed drivetrains. For other makes or models, check the compatibility of the freewheel body.

Q: What sprocket range should I choose?
R: For competition use and hilly roads, 11-28 or 11-30 are ideal. For mountainous or mixed terrain, 11-34 is better for handling steep climbs.

Q: Can it be used with a non-Shimano 12-speed chain?
A: We strongly recommend using a Shimano 12-speed chain to ensure precise shifting and prolong the life of the cassette.

Q: How do I maintain this cassette?
R: Regular cleaning with a brush and degreaser, followed by appropriate lubrication, to maintain constant gear changes and extend the life of the cassette.

Q: What's the difference with a Dura-Ace 12-speed cassette?
A: The Ultegra CS-R8101 offers excellent value for money. It's slightly heavier than the Dura-Ace, but still very smooth and durable for competitive or everyday use.