Shimano - 105 R7100 Di2 Disc Brake 12 Speed Groupset

Groupset Includes:

  • FC-R7100 Crankset
  • ST-R7170 L&R 7170 Di2 Brake/Shifter
  • FD-R7150 Di2 Front Derailleur
  • RD-R7150 Di2 Rear Derailleur
  • CS-R7100 Cassette
  • BR-R7170 Brakes
  • CN-M7100 SLX/105 Chain 12sp 126 Links
  • BT-DN300 Internal Battery
  • EW-EC300 Di2 Charging Cable
  • 2 x E-Tube Wires 
  • 2 x SM-RT70 Disc Rotors

Celebrating its 40th anniversary since first introduced in 1982, Shimano 105 receives the ultimate upgrade with a move to Di2 electronic shifting technology. The highly anticipated Shimano 105 R7100 group not only delivers Di2 performance to an entirely new range of riders, but it offers Shimano’s flagship 12-speed, wireless shifting with easy operation and increased reliability in a more attainable package.

Riders who have traditionally used mechanical shifting systems can now experience the function and technology inherited from recent ground-breaking updates to Dura-Ace and Ultegra. Shimano 105 Di2 is the culmination of years of research and development where flawless wireless shifting, tailored gearing, and an exceptional braking system mark a new era in affordable performance.

SHIMANO 105 Di2: Science of Speed

Just as with its original groundbreaking electronic Digital Integrated Intelligence shifting system launched in 2009, this latest version of Shimano Di2 features critical functional enhancements, including a wireless cockpit and the jump to 12-speed. And it’s all been done without any sacrifice to the fast, precise and reliable shifting riders have come to expect from all Shimano road groups. Changing gears is simple and consistent all the time, every time.

«  Evolved Di2 Platform – Completely redesigned Di2 system delivers fast shifting in a wireless cockpit design 

«  Most Advanced Drivetrain – Optimized 12-speed gearing for unmatched efficiency and seamless shifting

«  Refined Interface and Ergonomics – The optimal balance of comfort, aerodynamics, and aesthetics, Shimano 105 offers secure and comfortable ergonomics, and a cleaner cockpit aesthetic

«  Enhanced Brake System – Improving braking control, the new Shimano 105 brake system offers a quieter, maintenance-friendly system

«  New Carbon Wheels – Blending aerodynamics, rigidity, weight, and cost in a competitive full-carbon, tubeless wheel option


SHIMANO 105 Di2: Wireless Where it Matters

Shimano 105 Di2 utilizes a hybrid system, featuring a wireless cockpit paired with a wired connection between a single, seat-tube-stored battery and the front and rear derailleurs, ensuring absolute reliability in all conditions. And just like Dura-Ace and Ultegra, the Shimano 105 Di2 system is highly customizable using Shimano’s user-friendly E-TUBE PROJECT App on your smartphone.

With E-TUBE PROJECT you can set-up your drivetrain just the way you like it, adjusting shift speed, altering the number of shifts per button actuation, and utilizing Synchronized and Semi-Synchro shifting functionality.

You can also pair the system with third party cycling computers such as Garmin and Wahoo, which allow you to monitor gear selection or battery status.


SHIMANO 105 Di2: Refined Interface and Ergonomics

The new Shimano 105 dual control levers feature unparalleled ergonomics refined with pro rider feedback where a raised hood peak and new lever shape enhance comfort and control in every riding position. Braking is also optimized thanks to a lighter, smoother lever action and expanded braking control area.

The levers utilize Shimano’s proprietary wireless integrated circuit that features high security, fast processing speed and low power consumption. Contrast that with other wireless platforms and you get a significant decrease in interference probability, faster shift speeds, and longer battery life. And by using a single, internally housed rechargeable battery, charging is straightforward, and the battery is protected, further ensuring stable and reliable shifting at all times.


ST-R7170 Shifter

-        Wireless Di2 connectivity

-        2x12-speed Dual-Control lever

-        Refined hood for improved ergonomics and aerodynamics

-        Improved button access


SHIMANO 105 Di2: Advanced Drivetrain Technology

By making the move to a 12-speed cassette, Shimano 105 R7100 Series riders now have the high and low gearing they need, along with an intelligent progression of gear steps in between. This is the result of optimized drivetrain components, which include 11-34 and 11-36 cassette options and 50-34 and 52-36 cranksets. Together they deliver low, even sub 1:1, gear combinations that let riders take on steeper slopes and better control their efforts because gear steps are more closely spaced allowing you to always find a comfortable cadence.

The new system is also backwards compatible, meaning you can use your existing 11-speed freehub-equipped wheels with the new Shimano 105 Di2 drivetrain.


FC-R7100 Crank

-        HOLLOWTECH II Crank Set

-        2x12-speed

-        Chainring combinations:

        o   50-34T

        o   52-36T, available at later date


CS-R7100 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


CS-HG710-12 Cassette

-        12-speed

-        11-tooth small cog for optimal efficiency

-        Compatible with 11-speed freehub bodies

-        11-36T, available at later date


RD-R7150 Rear Derailleur

-        SHIMANO SHADOW Rear Derailleur

-        Integrated D-FLY connectivity

-        12-speed Di2 technology

-        Compatible with 11-34 and 11-36T cassettes


FD-R7150 Front Derailleur

-        12-speed Di2 technology

-        Fast, precise front shifting




SHIMANO 105 Di2: Better Braking

Just as with the latest Dura-Ace and Ultegra groupsets, the new Shimano 105 features a revamped braking system that’s quieter, easier to maintain, and supremely controlled and powerful. Top line features include a fast initial contact point with a wider control zone and 10% wider pad-to-rotor clearance assuring noiseless operation. Home mechanics will also appreciate a more user-friendly bleed process, which can be done without removing the caliper from the frame.

BR-R7170 Brakes

-       More fine-tuned control and heightened braking performance

-       10% wider pad clearance

-       Easier bleeding process

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