Every detail, every decision, and every component of Shimano’s new 12-speed road groups have been engineered to deliver a faster, more reliable, and more intuitive ride experience. In the pursuit of excellence, Shimano dedicated years of research and development to refine the road riding experience. Reconnecting riders with the road, ULTEGRA R8100 is about the joy of leaning into a tight switchback, or the comradery shared amongst friends after a playful day of town line sprints and coffee stops.
Shifting is flawless, and faster than previous iterations, while operating almost silently. This is thanks to Hyperglide+ tooth profiles, meaning that the chainrings and cassette have an improved connection with the chain, essentially improving shifting under load, across the cassette. Adding in a 12th sprocket, progression through the gears is smoother too.
Braking is equally impressive, and redesigned calipers provide more clearance between rotor and pad, reducing rubbing and scraping noises frequently heard in wet or gritty conditions. Servo Wave levers, which have been redesigned for improved ergonomics, speed up the initial travel so pad and rotor meet sooner, creating a more progressive feel.
Aesthetics are sleek, with the semi-wireless system eliminating wires from shifters to derailleurs. The battery remains mounted in the seatpost or seat tube, and this is wired to the derailleurs, while the charge port is now incorporated into the rear derailleur, so there is no junction box required. CR1632 coin cell batteries in the shifters provide 1.5 to 2 years of life and easy access to the port on the rear mech makes charging the rest of the system easy.
Features:
- Evolved Di2 Platform and Technology: ULTEGRA R8100’s new Di2 platform showcases Shimano’s most advanced drivetrain technology and shifting performance to date. Introduced alongside DURA-ACE R9200, the new Di2 platform delivers faster front and rear shifting than ever before so riders can focus on the terrain ahead with total confidence in their shifting performance. Further Di2 refinements include a charging port and D-FLY wireless connectivity integrated into the rear derailleur.
- Advanced Drivetrain Technology: The new R8100 ULTEGRA drivetrain provides faster, smoother shifting with Shimano’s proven HYPERGLIDE+ drivetrain technology. Developed first for mountain bike applications, HYPERGLIDE+ improves shifting both up and down the cassette, even under maximum pedalling load.
Includes:
- Ultegra R8100 Chainset (select your size)
- Ultegra CS-R8100 cassette (select your size)
- Ultegra Di2 ST-R8170 STI hydraulic brake/shift lever 12-speed right
- Ultegra Di2 ST-R8170 STI hydraulic brake/shift lever double left
- Ultegra BR-R8170 hydraulic disc brake callipers front and rear
- Ultegra Di2 RD-R8150 rear derailleur 12-speed grey
- Ultegra Di2 FD-R8150 front derailleur braze-on 2-speed grey
- XT/Ultegra M8100 12-speed 126L chain silver
- BT-DN300 Di2 internal battery black
- EW-EC300 charging cable 1700 mm
- EW-SD300 E-tube Di2 electric wire 1400 mm
- EW-SD300 E-tube Di2 electric wire 900 mm
Does Not Include:- Bottom Bracket - you will need a bottom bracket suitable for your frame. To shop bottom brackets click here
- Brake Rotors. To shop your preferred size of rotors click here
Note on E-Tube Wires:
Standard setup uses two E-tube wires, one to connect each derailleur to the Di2 battery.
The ideal length of wires needed depends on the length of your frame's tubes.
Two wires are included at lengths 900 and 1400 mm, which should be suitable for most frames. Different lengths are available
here if needed.