SHIMANO ULTEGRA R8170 DI2 DISC GROUPSET
With technology trickling down from flagship Dura-Ace, Shimano's Ultegra R8170 Di2 Disc Groupset is better than it has ever been before. It perfectly balances performance with value, and the components are slick, reliable, and only create a minimal weight penalty compared to Dura-Ace.
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.
There are plenty of configurations to choose from, including various crank lengths and both mid-compact and compact chainrings, making this groupset a fantastic option for the majority of riders looking to upgrade their bike to an electronic system.
You can also pair the system with most third-party cycling computers, including Garmin and Wahoo, which allow you to monitor gear selection or battery status.
The Groupset comprises of:
ST-R8170 Shifters
- Wireless Di2 connectivity
- 2x12-speed Dual-Control lever
- Refined hood for improved ergonomics and aerodynamics
- Improved button access
FC-R8100 - HOLLOWTECH II Crank Set - 2x12-speed
- Chainring combination: 52-36T
- 165mm Cranks
CS-R8100 Cassette - 12-speed
- 11-tooth small cog for optimal efficiency
- Optimized “Sweet Spot” Gears for pedaling efficiency
- Compatible with 11-speed freehub bodies
- 11-34T cassette
RD-R8150 Rear Derailleur
- SHIMANO SHADOW Rear Derailleur
- Integrated D-FLY connectivity
- 12-speed Di2 technology
- Compatible with 11-34T
FD-R8150 Front Derailleur
- 12-speed Di2 technology
- Fast, precise front shifting
BR-R8170 Brakes
- More fine-tuned control and heightened braking performance
- 10% wider pad clearance
- Easier bleeding process
RT-MT800 Ice Tech FREEZA Centre-Lock Rotors
- 160mm front and Rear Rotors
X12 Chain with Quick Link
Shimano Battery, Charging Cable and Electric Wires
This groupset comes complete with a Shimano E-Tube SEIS Di2 battery, charging cable and EW-SD300 E-Tube Di2 Electric Wires.
- E-Tube SEIS Di2 Battery, 7.4V Lithium-ion, 3-ports for SD300 wires, internal mount
- EW-EC300 Charging Cable,1700mm