Product DescriptionThis 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 HYPERGLIDE+ cassette technology for smoother shifting under load Hydraulic disc brakes with excellent modulation and control 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 Di2 Shifting: Shimano’s fastest electronic shifting with precise, instant response E-Tube Project Cyclist App: Wireless smartphone connectivity for customization, setup, maintenance, and firmware updates HYPERGLIDE+: Smooth, stable shifting up and down the cassette, even while pedaling hard ICE TECHNOLOGIES: Improved heat dissipation for quieter, more consistent braking performance Included in This KitEach kit includes one each of the following: ST-R8170 hydraulic Di2 shift/brake levers, pair BR-R8170 hydraulic flat mount disc brake calipers, front and rear SM-BH90 brake hoses, 1000mm front and 1700mm rear RT-CL800 Center Lock brake rotors, 160mm front and rear FC-R8100 crankset, 170mm, 52/36T CS-R8100 cassette, 11-30T, 12-speed RD-R8150 Di2 rear derailleur FD-R8150 Di2 front derailleur BT-DN300 Di2 battery CN-M8100 12-speed chain EW-SD300 wires, 900mm and 1200mm EW-EC300 Di2 battery charger 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 Model: BT-DN300 Chain Model: CN-M8100 Speed: 12-speed Di2 Wires Model: EW-SD300 Lengths: 900mm, 1200mm Charger Model: EW-EC300 Brake Adapter Model: SM-MA-R160 Application: Rear 140mm to 160mm CompatibilityCompatible 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 Retail Packaged
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