Shimano Ultegra CS-R8100

12-speed, 11-34
27Ratings
BrandMore from Shimano
Delivered between 30.3.2026 and 14.4.2026
free shipping

Number of teeth largest pinion2

Product details

The Shimano Ultegra CS-R8100 is a highly advanced 12-speed bike cassette designed for road cycling. Weighing approximately 348 grams, it offers precise and reliable shifting performance suitable for both ambitious athletes and recreational riders. The cassette features a gear range of 11 to 34 teeth, providing a wide array of gear ratios that ensure optimal adaptation to various terrain conditions. The use of high-quality materials, including steel for the sprockets and aluminum for the casing, ensures durability and robustness. The Hyperglide+ technology enables smooth and quick shifting, enhancing efficiency and riding pleasure. This cassette is an excellent choice for those who value performance and quality.

  • 12-speed system for precise shifting
  • Hyperglide+ technology for improved shifting
  • Wide range of 11-34 teeth for versatile applications
  • High-quality materials for durability and robustness.

Key specifications

Gradation of pinion sizes
11, 12, 13, 14, 15, 17, 19, 21, 24, 27, 30, 34
Number of pinions
12-speed
Weight
345 g
Number of teeth largest pinion
34 x
Number of teeth smallest pinion
11 x
Item number
17795440

General information

Manufacturer
Shimano
Category
Bike cassettes
Manufacturer no.
ICSR810012134
Release date
28.3.2023

Colour

Colour
Silver
Exact colour description
Silver

Material

Material group
Metal
Material
Steel

Cassette properties

Bike area of use
Racing bikes
Number of pinions
12-speed
Gradation cassette
11-34
Gradation of pinion sizes
11, 12, 13, 14, 15, 17, 19, 21, 24, 27, 30, 34
Number of teeth smallest pinion
11 x
Number of teeth largest pinion
34 x
Model year
2022

Origin

Country of origin
Cambodia

Voluntary climate contribution

CO₂-Emission
Climate contribution

Product dimensions

Weight
345 g

Package dimensions

Length
21.10 cm
Width
19.30 cm
Height
7 cm
Weight
502 g

30-day right of return
24 Months Warranty (Bring-in)

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Reviews & Ratings

Warranty score

How often does a product of this brand in the «Bike cassettes» category have a defect within the first 24 months?

Source: Digitec Galaxus
  • 1.Campagnolo
    0 %
  • 1.SunRace
    0 %
  • 3.Shimano
    0.1 %
  • 4.Sram
    0.4 %

Warranty case duration

How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?

Source: Digitec Galaxus
  • 1.Shimano
    0 days
  • 2.Sram
    4 days
  • Campagnolo
    Not enough data
  • SunRace
    Not enough data

Return rate

How often is a product of this brand in the «Bike cassettes» category returned?

Source: Digitec Galaxus
  • 1.Campagnolo
    1.3 %
  • 2.Shimano
    3.4 %
  • 3.SunRace
    5.5 %
  • 4.Sram
    5.6 %
Source: Digitec Galaxus