Product Overview
Electronic shifting for everyone. The gateway to Di2 performance.
The Shimano 105 R7170 Di2 marks a historic milestone—for the first time, Shimano's legendary electronic Di2 shifting technology is available at the 105 level. Sharing the same semi‑wireless architecture, refined ergonomics, and Hyperglide+ drivetrain as Dura‑Ace and Ultegra, this 2×12‑speed groupset delivers the transformative experience of electronic shifting at a price point that finally makes it accessible to a wider range of road cyclists.
For riders who have only experienced mechanical shifting, the R7170 represents a transformation of the road cycling experience. It's not just an upgrade—it's a new way to ride.
Key Features
⚡ Semi‑Wireless Di2 Electronic Shifting
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Wireless shift levers – shift commands transmit wirelessly to the front and rear derailleurs
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Central battery system – BT‑DN300 battery (52g) conceals in the seatpost or seattube, wired to both derailleurs
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Lightning‑fast shifts – precise, reliable shifting even under heavy load
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CR1632 coin cell batteries in shifters provide an impressive up to 3 years of battery life
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Charging port integrated into the rear derailleur – no junction box required
🎛️ Fully Customisable via E‑Tube App
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Adjust shift speed and preferences
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Select fully or semi‑synchronous shift modes
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Assign functions to programmable shifter buttons – control your cycle computer, change pages, or activate a bell
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Monitor battery status and system diagnostics
🛞 12‑Speed Drivetrain with Hyperglide+
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2×12‑speed configuration – 24 total gear combinations
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Hyperglide+ tooth profiles deliver seamless shifting even under load
🛑 Hydraulic Disc Brakes – Confident Stopping Power
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BR‑R7170 calipers with improved clearance between rotor and pad – reduces rubbing and noise
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Servo Wave technology delivers powerful, consistent braking with excellent modulation
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Bleed brakes without dismounting the caliper from the frame – convenient maintenance
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Adjustable brake lever stroke – suitable for riders with smaller hands
🖐️ Advanced Ergonomics – Shared with Dura‑Ace & Ultegra
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Inward‑angled shifters – natural hand position for improved control
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Increased button height by 1.5mm – easier to operate even with gloves or in cold weather
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Ample space between shifter and handlebar – comfortably accommodates three fingers
⚙️ Hollowtech II Crankset
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FC‑R7100 crankset with Hollowtech II construction
🔧 Shadow RD Design
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Compact, reliable design with integrated wireless unit
Specifications
Available Configurations
| Option | Choices |
|---|---|
| Crank Length | 165mm / 170mm / 172.5mm / 175mm |
| Chainring Size | 50‑34T (Compact) |
| Cassette | 11‑34T |
| Rotor Size | 160mm / 140mm |
What's in the Box
A complete groupset typically includes:
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Shimano 105 Di2 ST‑R7170 Shift / Brake Levers × 2 (Left + Right)
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Shimano 105 BR‑R7170 Brake Calipers × 2 (Front + Rear)
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Shimano 105 Di2 FD‑R7150 Front Derailleur
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Shimano 105 Di2 RD‑R7150 Rear Derailleur
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Shimano 105 FC‑R7100 Crankset (crank length and chainring options vary)
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Shimano 105 CS‑R7101 Cassette (11‑34T)
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Shimano SLX CN‑M7100 12‑Speed Chain (with quick‑link)
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Shimano SM‑RT10 Disc Rotors × 2 (160mm)
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Shimano BT‑DN300 Internal Battery
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Shimano EW‑EC300 Charging Cable
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Shimano EW‑SD300‑I E‑Tube Wires × 2 (900mm + 1400mm)
Note: Bottom bracket, adapters, and hubs are not included and must be purchased separately according to your frame's specifications.
Why Choose Shimano 105 R7170 Di2?
"105 Di2 R7170花了DA套件不到一半的钱，但也能获得DA套件80%的使用体验，确实性价比极高。"
(Translation: "105 Di2 R7170 costs less than half the price of Dura‑Ace but delivers 80% of the experience – exceptional value for money.")
What Riders Are Saying
"Very good and reliable shifting performance. Even being able to shift under load is effortless." — Mantel
"The groupset has the same technology as Dura‑Ace (just does not have satellite shifter)." — Verified Customer
"The size and feel of the STI levers are really very comfortable and well-suited to long‑distance riding. I'm very impressed by the shifting performance." — Christian, 5/5 Review
"105 Di2 is the real deal when it comes to how it works/performs. It just shifts at the press of a button – light, crisp, and fast." — PEZ Cycling News
"All the road groupset most of us will ever need. Fast precise electronic shifting." — Cyclist
"The shifting is slightly slower than an Ultegra Di2, but this is only noticeable in a direct comparison and, in my view, does not justify the extra cost." — Christian, 5/5 Review
Technical Notes
⚠️ Semi‑Wireless System: Shift levers are wireless; derailleurs connect to the central battery via E‑Tube wires
⚠️ Battery Life: Shifter coin cell batteries last up to 3 years; central battery typically lasts 1.5 to 2 years per charge
⚠️ Charging: Charge the system via the port on the rear derailleur – no junction box required
⚠️ Bottom Bracket: Not included – purchase separately according to your frame's BB standard
⚠️ Satellite Shifters: Not supported – R7170 lacks the ports for sprint and climb shifters
⚠️ Top Buttons: Not available – R7170 shifters do not have the top-mounted auxiliary buttons found on Ultegra and Dura‑Ace
⚠️ Freehub: Requires HG 11/12‑speed freehub body
⚠️ Chain Compatibility: Use Shimano 12‑speed chains (CN‑M7100 or above)
⚠️ Disc Brake Only: R7170 is hydraulic disc brake only – not compatible with rim brakes
About Shimano 105
First launched in 1982, Shimano 105 has been the choice of dedicated amateur riders and enthusiasts for over 40 years. For its 40th anniversary, 105 received its ultimate upgrade with electronic Di2 shifting – bringing the same semi‑wireless technology, refined ergonomics, and Hyperglide+ drivetrain from Dura‑Ace and Ultegra to a wider audience. 105 R7170 Di2 represents the democratisation of electronic shifting – World‑class performance at a price that finally makes it accessible.
Experience the transformation. Add Shimano 105 R7170 Di2 to your cart today!
