Cheat Sheet: 12-speed Bluetooth Connection Mode

Updated May 4, 2025by BetterShifting Terry1 min read

12-speed Di2 bikes have BluetoothLE and ANT functionality out of the box.

This means that you can connect your bike to most bike computers by adding the bike as a sensor, and show the selected gears and battery info on screen.

To change settings or update firmware using the Android/iOS mobile app E-Tube Cyclist, you need to enter Bluetooth Connection mode.

You do so by pressing the rear derailleur button for 0.5 - 2 seconds.

The LED will flash blue while the bike is in Bluetooth connection mode (for about 30 seconds).

About the Author - BetterShifting Terry

I enjoy playing with bike tech - both bike building and wheel building, bike maintenance and of course, Di2. Besides writing content and working on the technical side of BetterShifting, I also work as a Software Developer in The Netherlands. Read more on the About this site page.

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