Product Description
This Shimano Ultegra R8170 Di2 complete groupset is a premium 12-speed electronic road kit built around the same design philosophy as Dura-Ace, delivering fast wireless cockpit shifting, precise braking, and race-ready drivetrain performance in a more attainable package. It is an ideal foundation for a high-end road bike build, whether you are upgrading a current frame or completing a new disc road project.
Ultegra Di2 brings Shimano’s fastest-ever shifting to the road with crisp, instant gear changes at the push of a button. The semi-wireless cockpit keeps the front end clean while maintaining Shimano’s renowned reliability, and the HYPERGLIDE+ drivetrain technology allows smooth, secure shifting even under load. Paired with ICE TECHNOLOGIES braking and a refined 12-speed gear range, this kit offers the kind of performance that makes every ride feel faster, smoother, and more connected.
Key Features
- Complete Shimano Ultegra R8170 Di2 12-speed groupset
- Premium electronic shifting with Shimano Di2 technology
- Semi-wireless cockpit for a cleaner front-end setup
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HYPERGLIDE+ cassette technology for smoother shifting under load
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Hydraulic disc brakes with excellent modulation and control
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ICE TECHNOLOGIES rotors for improved heat management and more consistent braking
- Includes crankset, cassette, chain, derailleurs, battery, wires, charger, brakes, and rotors
- Ideal for high-end road bike builds using a 2x12 Shimano electronic drivetrain
Groupset Highlights
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Di2 Shifting: Shimano’s fastest electronic shifting with precise, instant response
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E-Tube Project Cyclist App: Wireless smartphone connectivity for customization, setup, maintenance, and firmware updates
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HYPERGLIDE+: Smooth, stable shifting up and down the cassette, even while pedaling hard
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ICE TECHNOLOGIES: Improved heat dissipation for quieter, more consistent braking performance
Included in This Kit
Each kit includes one each of the following:
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ST-R8170 hydraulic Di2 shift/brake levers, pair
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BR-R8170 hydraulic flat mount disc brake calipers, front and rear
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SM-BH90 brake hoses, 1000mm front and 1700mm rear
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RT-CL800 Center Lock brake rotors, 160mm front and rear
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FC-R8100 crankset, 170mm, 52/36T
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CS-R8100 cassette, 11-30T, 12-speed
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RD-R8150 Di2 rear derailleur
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FD-R8150 Di2 front derailleur
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BT-DN300 Di2 battery
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CN-M8100 12-speed chain
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EW-SD300 wires, 900mm and 1200mm
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EW-EC300 Di2 battery charger
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SM-MA-R160 rear brake adapter for 140mm to 160mm rear setup
Specifications
Shifters / Brake Levers
- Model: Shimano Ultegra ST-R8170
- Type: Di2 hydraulic disc shift/brake levers
- Speed: 12-speed
- Position: Front and rear pair
Brake Calipers
- Model: Shimano Ultegra BR-R8170
- Type: Hydraulic disc, flat mount
- Position: Front and rear pair
Brake Hoses
- Model: SM-BH90
- Lengths: 1000mm front, 1700mm rear
Rotors
- Model: Shimano RT-CL800
- Mount: Center Lock
- Size: 160mm front, 160mm rear
Crankset
- Model: Shimano Ultegra FC-R8100
- Length: 170mm
- Chainrings: 52/36T
- Speed: 12-speed
Cassette
- Model: Shimano Ultegra CS-R8100
- Range: 11-30T
- Speed: 12-speed
Rear Derailleur
- Model: Shimano Ultegra RD-R8150
- Type: Di2 electronic
Front Derailleur
- Model: Shimano Ultegra FD-R8150
- Type: Di2 electronic
Battery
Chain
- Model: CN-M8100
- Speed: 12-speed
Di2 Wires
- Model: EW-SD300
- Lengths: 900mm, 1200mm
Charger
Brake Adapter
- Model: SM-MA-R160
- Application: Rear 140mm to 160mm
Compatibility
Compatible with:
- Road frames designed for Shimano 2x12 Di2 drivetrains
-
Flat mount disc brake road frames and forks
-
Center Lock rotor-compatible hubs
- Frames accommodating internal Di2 battery
- Rear wheel setups compatible with 11-30T 12-speed Shimano road cassette
Please confirm frame, bottom bracket, rotor mount, wire length, and axle/brake compatibility before purchase.
Warranty and Notes
- Premium Shimano Ultegra Di2 12-speed electronic disc road groupset
- Substitutes NOT AVAILABLE
- Includes only the parts listed above
- Please review all included items and compatibility needs before purchase
- Direct From Shimano North America
Condition
- New
- Genuine OEM product
- Includes only what is shown or described
- NON Retail Packaged
