Disc Brake Dual Control Lever (Wireless)

Disc Brake Dual Control Lever (Wireless)

Ultegra ST-R8170

Just like the previous generation R8070 Ultegra dual control levers, these have 'hidden' buttons on top of the shifter hoods. You can set these up any way you like and I wrote an article on just that: setting up the Di2 shifter hood buttons.

Wireless and wired

While these shift levers support the new wireless Di2 shifting, you can also choose to connect it using EW-SD300 wires. Doing so will improve battery life by approximately 50%.

These shift levers have one SD300 port and one satellite shifter (SW-RS801-T / SW-RS801-S / SW-RS801-E) port.

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The Pro's Closet

Updating wireless levers

While you can customise these levers and change button assignments using the mobile app, you cannot easily update them. The levers need to be wired to the rest of the system in order to enable updating via the mobile app.

I have written a guide on updating 12-speed wireless dual control levers. Read that if you're stuck updating your levers, or simply send me a message.

If video is more your thing, watch Rides of Japan update his levers below:


  • Model code: ST-R8170
  • Series: Ultegra (R8100)
  • Weight: 195g (per lever)
  • Speeds: 12
  • Number of switches: 3
  • SD300 ports: 1
  • Satellite Shifter ports: 1
  • Battery: CR1632 (1 per lever)
  • Wire shifting: Yes
  • Wireless shifting: Yes
  • Servo wave: Yes
  • Free stroke adjust: Yes
  • Reach adjust: Yes
  • Brake type: Disc

Related components

View the Internal Battery (BT-DN300)


Internal Battery

View the Shadow Rear Derailleur (12 speed) (RD-R8150)


Shadow Rear Derailleur (12 speed)

View the Front Derailleur (FD-R8150-F)


Front Derailleur

View the Internal Battery Charging Cable (EW-EC300)


Internal Battery Charging Cable

Related pages

Read Building a 12-Speed Di2 Road Bike - components and wiring
12-Speed Di2

Building a 12-Speed Di2 Road Bike - components and wiring

Building a 12-speed Di2 bike involves a couple of steps and decisions to make. Are you building a rim brake bike or a disc brake bike? Will you connect the shifters wired, or run them wireless? What cables and what length do you need? I'll guide you along the process.

Read Install 12-speed satellite shifters (EW-RS801)
Installation Guide

Install 12-speed satellite shifters (EW-RS801)

Shimano 12-speed satellite shifters are tiny buttons or shifters that you can place in the drops, on the tops, or on your aero extensions. This page explains how to install the different satellite shifters and how to wrap the handlebar tape around them.

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