New SHIMANO 105 Di2 Delivers 12-Speed Shifting and Wireless Performance to More Riders

Celebrating its 40th anniversary since its first introduction 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 also offers Shimano’s
flagship 12-speed, wireless shifting with easy operation and increased reliability in a more attainable

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

With its original groundbreaking electronic Digital Integrated Intelligence (Di2) 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 – A completely redesigned Di2 system delivers fast shifting in a wireless
cockpit design.
 Most advanced drivetrain – Optimized 12-speed gearing for unmatched efficiency and seamless
 Refined interface and ergonomics – With the optimal balance of comfort, aerodynamics, and
aesthetics, Shimano 105 provides secure and comfortable ergonomics and a cleaner cockpit
 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 the Synchronized and Semi-Synchro
shifting functionality.
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.

SHIMANO 105 Di2SHIMANO 105 Di2: Refined interface and ergonomics

The new Shimano 105 dual control levers feature unparalleled ergonomics and refinements following
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. By using a
single, internally housed rechargeable battery, charging is straightforward, and the battery is protected
– ensuring stable and reliable shifting at all times.

ST-R7170 Shifter

  • Wireless Di2 connectivity
  • 2×12-speed Dual-Control lever
  • Refined hood for improved ergonomics and aerodynamics
  • Improved button access

SHIMANO 105 Di2: Advanced drivetrain technology

By moving to a 12-speed cassette, Shimano 105 R7100 Series now has the high and low gearing that
riders want, 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

  • 2×12-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 feels more 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 an improved and user-friendly bleed process that can be performed 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

New RS710 Carbon Wheels

Continuing the theme of affordable trickle-down technology, Shimano is also launching its two most
affordable carbon road wheelsets ever—the C32 for climbing and C46 for all around use. Both share
DNA with the C36 and C50 Dura-Ace and Ultegra wheel options, balancing aerodynamics, light weight,
and rigidity.

The C32 features a 32mm rim height, 21mm internal rim width and target wight of 1,502g. The C46 is
46mm tall, has a 21mm internal rim width and target weight of 1,610g. Both non-series wheels are 11-
and 12-speed compatible, tubeless ready and come with an attractive Shimano logo design.


Lightweight wheels for riding where acceleration is key

  • 665g front wheel, 839g rear wheel
  • 21mm internal, tubeless rim


All-around wheels for breakaways and more

  • 719g front wheel, 893g rear wheel
  • 21mm internal, tubeless rim

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