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Who it is for and how to use it
Ideal for
Riders who want a complete electronic 2x12v group set
Designed for those looking for a complete Shimano Ultegra Di2 R8170 Group Set with 2x12v drivetrain, disc brakes and Center Lock standard. The specification includes Di2 components, cables and rotors for a consistent build on advanced road bikes.
Those upgrading or replacing the entire drivetrain-braking system
Suitable for anyone replacing a complete group set and wanting components matched to each other: crankset, cassette, chain, derailleurs, brakes and the internal Di2 BT-DN300 battery. 2x12v compatibility makes it suitable for a specific setup.
Road setup with disc brakes and electronic control
Indicated for road use with disc brakes and Di2 electronic control. The Center Lock RT-MT800 Ice-Tech rotors and the ST-R8170/BR-R8170 controls define a modern, technical system.
Use cases
Ideal
Complete electronic road bike build
The group set includes drivetrain, brakes, internal Di2 BT-DN300 battery and EW-EC300, EW-SD300 e-Tube Di2 cables. It provides a complete basis for a coherent 2x12v build.
Gruppo completo · 2x12v · Di2 · Freni a disco
Very suitable
Replacing multiple components in one job
The specification includes crankset, CS-R8100 Ultegra cassette, CN-M8100 12-speed chain, RD-R8150 and FD-R8150 derailleurs, plus the brake kits. It reduces the need to source separate parts.
Use on a bike with a Center Lock disc brake system
The RT-MT800 Ice-Tech rotors with Center Lock standard make it suitable for frames and wheels with this system. Compatibility is clearly defined for a precise setup.
Center Lock · Dischi freno · Ice-Tech · Freni a disco
Suitable
Di2 wiring with tidy cable routing
Included are a 1700 mm charging cable and 600 mm and 1200 mm EW-SD300 e-Tube Di2 electrical cables. The cable lengths help cover a full group set layout.
Cavi EW-SD300 · e-Tube Di2 · 1700 mm · 600 mm
Who it is for
Road cyclist focused on precision
Looks for
A complete 2x12v group set with Di2 electronic shifting and disc brakes.
Why
This set brings together the main components in a coherent configuration, with Center Lock standard and e-Tube Di2 wiring.
Workshop or mechanic preparing a complete build
Looks for
Pre-matched components for drivetrain and braking on a Shimano platform.
Why
The specification includes the functional groups needed for an integrated build, without having to assemble disconnected parts.
Frequently asked questions
How many speeds does this group set support?
The group set is 12-speed. The configuration is designed for a 2x12v drivetrain.
What standard do the brake rotors use?
The rotors are Center Lock. This standard defines the rotor attachment to the hub.
What is the drivetrain compatibility?
Compatibility is 2x12v. It indicates a double chainring configuration with a 12-speed cassette.
What does the main specification include?
It includes crankset, CS-R8100 Ultegra cassette, CN-M8100 12-speed chain, internal Di2 BT-DN300 battery, derailleurs and disc brake kit. It is a complete group set.
Are cables included for the Di2 system?
Yes, the EW-EC300 1700 mm charging cable and the EW-SD300 e-Tube Di2 electrical cables in 600 mm and 1200 mm are included.
Information prepared by the BSA team with the support of AI, based on the manufacturer's specifications.
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