In this article, I’ll show you how to connect a Shimano Di2 system to your bike computer, discuss popular compatible models such as Garmin Edge, Wahoo, Leyzne, Sigma, Bryton, and iGSPORT series, and answer some of the frequently asked questions.
Prerequisites
The Shimano Di2 system and bike computer are connected wirelessly via Bluetooth or ANT+. You’ll need the following:
- 12-speed Shimano Di2 (Dura-Ace, Ultegra, 105), or
- 11-speed Shimano Di2 (Dura-Ace, Ultegra, GRX)
- BT-DN110 internal battery (for 11-speed)
- EW-WU111 wireless unit (for 11-speed)
- ANT+ and/or Bluetooth-capable and compatible bike computer
How to pair Shimano Di2 to a bike computer
Follow these steps to pair the 11 and 12-speed Shimano Di2 to the bike computer.
- Put the Di2 system in pairing mode.
- 11-speed, press and hold the function button on Junction A until the red and green LEDs flash alternately. The Junction A can be found below the stem, handlebar end, or downtube, depending on the setup.
- 12-speed, press the hold the function button on the rear derailleur until the blue LED flashes.
- On the bike computer, search for new sensors.
- Garmin, go to Sensors > Add Sensor > Search all
- Wahoo, go to Settings > Add Sensor
- Lezyne, go to Menu > Sensors > Shifting > Scan BTLE
- Sigma, go to Sensors > Search Sensor > Shimano Di2
- Bryton, go to Page > Settings > Sensors > Di2
- IGPSPORT, go to Settings > Sensors > Add Sensor > Di2
- Add the Shimano Di2 sensor, and you’re done.
Compatible bike computer models
Please note that this table is not exhaustive, and additional compatible bike computer models may be on the market. Always check the product specifications or user manual to confirm Di2 compatibility before purchasing.
| Brand | Model |
|---|---|
| Garmin | Discontinued : Edge 510, Edge 520, Edge 810, Edge 820 Current : Edge 530, Edge 830, Edge 1030 Latest : Edge 840, Edge 1040 |
| Wahoo | Discontinued : Edge 510, Edge 520, Edge 810, Edge 820 Current : Edge 530, Edge 830, Edge 1030 Latest : Edge 840, Edge 1040 |
| Lezyne | Current : Mega XL, Mega C |
| Sigma | Current : ROX 11.0, ROX 12.0 |
| Bryton | Current : Rider S800, Rider S500, Rider 750, Rider 420, Rider 320 |
| iGPSPORT | Current : iGPSPORT iGS630, iGPSPORT iGS620 |
FAQ
Does Hammerhead Karoo 2 support Di2 integration?
Shimano Di2 integration is supported by the Hammerhead Karoo 2 up to the Karoo Software Build Version 1.297.1231. Any software version after that (2nd June 2022 onwards) doesn’t support Shimano Di2 integration, as requested by Shimano.
Can I connect my Shimano Di2 system to any bike computer?
No, you need a compatible bike computer. Popular compatible brands include Garmin, Wahoo, Lezyne, Sigma, and Bryton. Refer to the compatibility table above or check the bike computer’s product specifications.
Do I need additional components to connect my Shimano Di2 system to a bike computer?
Yes, you will need a Shimano Di2 wireless unit (for 11-speed) to connect your Di2 system to a compatible bike computer. This unit enables wireless communication between the two devices.
The wireless communication capabilities are already built-in into the 12-speed rear derailleur.
How do I know if my bike computer is successfully connected to my Shimano Di2 system?
Once connected, your bike computer should display the status of the Di2 system. You can then set up the data fields to display real-time gear information and battery levels.
If you don’t see this information, try waking up the Di2 system by pressing the shifter button. Check your connections and ensure that both devices are paired correctly.
Can I customize the Di2 data displayed on my bike computer?
Yes, most compatible bike computers allow you to customize the data fields displayed on the screen. You can choose which Di2 metrics you’d like to see, such as gear position or battery level, according to your preferences.
Alex Lee is the founder and editor-at-large of Mr. Mamil. Coming from a professional engineering background, he breaks down technical cycling nuances into an easy-to-understand and digestible format here.
He has been riding road bikes actively for the past 12 years and started racing competitively in the senior category during the summer recently.