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Shimano Ultegra CS-R8101 cassette, 12-speed

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RRP 121 €
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Delivery method on Thursday 22.01.2026
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Delivery method on Thursday 22.01.2026
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Shimano Ultegra CS-R8101 12-wheel

A sophisticated combination of 12-speed cassette gears provides maximum efficiency and acceleration performance in every situation. HYPERGLIDE+ technology ensures faster and smoother shifting even at maximum load.
Product features
HYPERGLIDE+ technology ensures faster and smoother shifting
Compatible with new 12-speed and road 11-speed freehub
Product details
Gears 12
Number of teeth 11-30: 11-12-13-14-15-16-17-19-21-24-27-30
11-34: 11-12-13-14-15-17-19-21-24-27-30-34
Nut Shimano HG
Weight 11-30T: 291 g
11-34T: 345 g
Material aluminium, steel, nickel finish
product ID 290859
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WARNING
For installation, adjustment and replacement information not found in the user's manual, consult the place of purchase or a distributor. A dealer's manual intended for professional and experienced bicycle mechanics is available on our website (https://si.shimano.com).
For safety, be sure to read this “user's manual” thoroughly before use, follow it for correct use, and save it so that you can refer to it at any time.
The following instructions must always be followed in order to avoid personal injury and physical damage to equipment and the surroundings. The instructions are classified according to the degree of danger or damage that may occur if the product is used incorrectly.
DANGER - Failure to follow the instructions will result in death or serious injury.
WARNING - Failure to follow the instructions could result in death or serious injury.
CAUTION - Failure to follow the instructions could result in personal injury or physical damage to equipment and the surroundings.

WARNING
- Do not disassemble or modify the product. This may cause the product to malfunction, you may fall unexpectedly and be seriously injured.

Shimano
Road Shimano
Japanese manufacturer produces road, mountain, gravel, trekking, BMX and e-bike groupsets. They also offer a whole series of components and apparel. Their range goes from wheels, footwear, eyewear to backpacks. Shimano is a traditional manufacturer known for their quality work, which is why they are the favourite choice of amateurs and professionals.
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