Shimano Ultegra Di2 R8170 Groupset

Shimano Ultegra Di2 R8170 2x12-Speed Groupset

Upgrade your road bike with fast, precise electronic shifting and powerful hydraulic disc braking. The Shimano Ultegra Di2 R8170 groupset combines a 2x12-speed drivetrain with wireless shift controls, comfortable lever ergonomics and customisable settings through the Shimano E-Tube app.

Packaging: Supplied in OEM packaging, without a retail box.

Sold separately: Disc rotors and bottom bracket. A rear 160 mm brake adapter is not included.

Electronic shifting with a clean cockpit

The Di2 system transmits shift commands wirelessly from the levers, while both derailleurs connect to a central internal battery. This setup reduces cockpit wiring and delivers quick, consistent gear changes at the touch of a button.

Use the Shimano E-Tube app to adjust shifting settings, assign button functions and choose between manual, semi-synchronised and fully synchronised shifting modes.

ST-R8170 shift/brake levers and BR-R8170 brake calipers

The Ultegra ST-R8170 dual-control levers combine electronic shifting and hydraulic braking in an ergonomic design. Raised hoods and adjustable lever reach help you find a comfortable, secure hand position on long rides.

SERVO WAVE technology provides controlled, powerful braking. The compact BR-R8170 flat-mount calipers offer increased pad clearance to help reduce rotor rub, along with a design that simplifies maintenance and bleeding.

FC-R8100 crankset

The Shimano Ultegra FC-R8100 crankset forms the foundation of the 2x12-speed drivetrain, working with the front derailleur, cassette and chain to deliver smooth, efficient shifting.

FD-R8150 front derailleur

The Ultegra Di2 FD-R8150 delivers fast, precise changes between chainrings with minimal effort. Automatic trimming adjusts the derailleur position to help prevent chain rub as you move through the cassette.

Settings can be adjusted through the Shimano E-Tube app.

RD-R8150 rear derailleur

The Ultegra Di2 RD-R8150 delivers quick, consistent shifts across the 12-speed cassette. Its low-profile SHADOW design helps reduce exposure to impacts.

The rear derailleur also houses the system’s charging port and battery-status indicator, allowing you to charge the internal battery without removing it from the bike.

CS-R8100 12-speed cassette

The Ultegra CS-R8100 cassette uses HYPERGLIDE+ technology for smooth shifting under load, whether you are climbing or accelerating.

Cassette options are 11–30T or 11–34T, depending on the selected configuration. The cassette is compatible with Shimano 11-speed road freehub bodies.

CN-M8100 12-speed chain

The Shimano CN-M8100 chain is designed for Shimano 12-speed drivetrains. Its shaped inner plates support secure chain engagement and smooth running, while the SIL-TEC treatment helps reduce friction and wear.

Supplied with 126 links and a QUICK-LINK connector.

BT-DN300 internal battery

The BT-DN300 battery connects to both derailleurs and is designed for internal installation in a compatible frame. It can remain installed during charging.

EW-SD300-I E-Tube cables

The compact EW-SD300-I cables connect the internal battery to the front and rear derailleurs. Their small connectors make internal routing easier.

EW-EC300 charging cable

The EW-EC300 cable charges the Di2 system through the charging port on the rear derailleur.

Included in the box

• 1 × Shimano Ultegra Di2 ST-R8170 front shift/brake lever with BR-R8170 flat-mount brake caliper

• 1 × Shimano Ultegra Di2 ST-R8170 rear shift/brake lever with BR-R8170 flat-mount brake caliper

• 1 × Shimano Ultegra FC-R8100 crankset

• 1 × Shimano Ultegra Di2 FD-R8150 front derailleur

• 1 × Shimano Ultegra Di2 RD-R8150 rear derailleur

• 1 × Shimano Ultegra CS-R8100 12-speed cassette, 11–30T or 11–34T depending on the selected configuration

• 1 × Shimano CN-M8100 12-speed chain, 126 links, with QUICK-LINK

• 1 × Shimano BT-DN300 internal battery

• 1 × Shimano EW-SD300-I E-Tube cable, 600 mm

• 1 × Shimano EW-SD300-I E-Tube cable, 1,200 mm

• 1 × Shimano EW-EC300 charging cable

Not included: Disc rotors, bottom bracket and rear 160 mm brake adapter.

• Disc Rotors, order here
• Bottom Bracket, order here