The kit includes chainring and crank arm, front and rear derailleurs, front and rear brakes with hoses, left and right shifters, battery, and charging cable. You will need the electric wires to connect the components to the battery - the connecting tool comes with the rear derailleur. You might wish to add a 3rd, long cable, for updating the wireless shifters - they are wireless but need to be connected to the battery for firmware updates. I did the initial updates before putting everything in place, but any future updates may be a faff. Unless you are already running 160mm rotors on your rear wheel, you will need to buy the Shimano adapter to lift the caliper away from the chainstay and give the clearance for the larger disc. \t comes attached to the front caliper but not the rear. I was able to remove and re-install my bottom bracket without damage, for routing the brake hose. Otherwise, you might need another bottom bracket. You may then need to cut your hoses to size, so you might need a cutter, some spare barbs, and a barb insertion tool. Then obviously a little bit of bleeding. Finally, you will need grommets and blanking plates to protect the wires and close the old gear routing. Installation itself is an exercise in patience, but essentially straightforward.
Product Details
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 seattube, 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.
Includes
Shimano Ultegra Di2 ST-R8170 hydraulic disc, Di2 E-tube STI set, flat mount calipers, left/rear and right/front
Shimano Ultegra Di2 FC-R8100 12-speed double chainset
Shimano CS-R7100 105 12-Speed Cassette 11 - 34T
Shimano SLX/105 CN-M7100 chain with quick link, 12-speed, 126L
Shimano Ultegra Di2 RD-R8150 12-speed rear derailleur, E-tube
Shimano Ultegra Di2 FD-R8150 12-speed front derailleur E-tube, braze on, double
RT-CL800 disc rotors with internal lockring, Ice Tech FREEZA, 160mm
Di2 BT-DN300 internal mount battery, 3-port
EW-EC300 battery charging cable, 1700mm
This groupset excludes di2 cables and a bottom bracket. If you require assistance with this please contact us.
Features
- 2x12-speed, disc brake, semi-wireless electronic groupset
- Rear derailleur is quick, smooth and effortless, for unmatched drivetrain efficiency
- Rear derailleur's compact design includes an integrated wireless unit, charger, and switch
- Button on the rear derailleur for Di2 operations, and LED light denotes synchronised shift mode, setting mode and charge requirements
- Rear derailleur wirelessly connects to the shifters
- Low profile Shadow derailleur design
- Ultegra wireless hydraulic Servo Wave disc brake Di2 STI levers give you control, modulation and power with minimal effort in all riding conditions
- Levers use CR1632 batteries which last for approximately 1.5-2 years
- Improved ergonomic design
- Hyperglide+ technology in the sprockets and chain improves shifting under load
- XT rotors have a stainless steel / alloy 3-layer sandwich construction that manages heat
- 12-speed E-tube Di2 compatible
- E-Tube Electric Wires sold separately
Specifications
- Discipline Compatibility
- Road
- Family
- Shimano Ultegra
- Intended Use
- Performance
- Speed Compatibility
- 12-speed
- Product code
- 1701290 / 54294918365530
Reviews
Disappointed to find a 105 cassette as part of this Ultegra bundle
Shipping & Returns
Free UK delivery on orders over £50. Orders are dispatched within 1-2 working days and typically arrive 1-2 working days later.
Return unused items in their original packaging within 30 days of delivery. Return postage is £3.50.
Q & A
8 questions answered
Would this groupset fit on a CAAD13 Disc Ultegra (https://www.cannondale.com/en/bikes/road/race/caad13/caad13-disc-ultegra)?
Hi there, Yes this will, Many thanks Joe W
Hi – would this work with a 2015 Specialized Roubaix SL4 Comp Disc? I assume I’d need a BB30 to Hollowtech II adapter for the bottom bracket, and either stick with my current rear brake or use an adapter, as the frame isn’t flat-mount.
Hi there, Please contact the sale team directly and they will assist with this, Many thanks Joe W
Hi will this fit an Orbea orca M30 2024 with Shimano 105
Hi there, Yes it will, Many thanks Joe W
About Shimano
Shifting the way the world rides.
From a single Osaka workshop in 1921, Shimano has grown into the world's most influential component maker. The brand's relentless engineering — Dura-Ace, Ultegra, GRX, XTR — has shaped the way the world shifts, brakes and rides, on the road and off it.
Shimano's flagship groupset, Dura-Ace, has been the benchmark for top-level road components for more than five decades. Every refinement that lands on Dura-Ace eventually shapes the entire Shimano range, all the way down to entry-level drivetrains.
