SB20 - Can't Connect to Zwift

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Stages SB20 Connection Issues

December 17, 2025: Zwift Release 1.104.0 has broken SB20 connections for PC, Mac, iOS and Apple TV users.

🚀 Bugs in Zwift Version 1.104.0 - NOW FIXED!


UPDATE December 20, 2025: All platforms fixed with update to version 1.104.3

✅ Apple TV - Tested and working
✅ PC/Mac - Tested and working
✅ iOS - Tested and working


Here's how to check your Zwift App version number:
  • iOS and Apple TV: Bottom right corner of login screen. Also shown in App Store.
  • PC/Mac: Splash screen shown at start up.

------ Bug History ------

December 17, 2025:   Zwift Release 1.104.0 seriously impacts PC, Mac, iOS and Apple TV users who use Bluetooth to connect with the Stages SB20.

Bug Summary: The Stages Bike is not listed as a Power Source or Resistance controller.

Here's how to recreate the problem.
  • Turn on the SB20 Bike
  • Start pedalling to wake up the power meter cranks
  • Open the Zwift app on a PC, Mac,  iOS or Apple TV
  • Login as usual



You will see the Paired Devices screen.



  1. On PC/Mac: Ensure that Pair Through Phone button is displayed indicating Bluetooth pairing is active. This is confirmed when the Bluetooth icon is shown in the upper right corner of the screen. iOS devices don't have this button so just proceed. Click the Power Source box to continue. 

  2. Power Source Selection: Both Stages power meters are shown. The Stages Bike is not listed. Click on the Left Crank to continue.

  3. Cadence Selection: Both Stages power meters and Stages Bike are listed.  Click on the Stages Bike or Left Crank to continue.

  4. Resistance Selection:  Stages Bike is not listed.  
This bug prevents SB20 PC, Mac and iOS users from using Zwift.


____________________________

Two temporary workarounds have been found.

Workaround 1: Use the Zwift Companion App on a phone to make connections to the SB20.

This workaround works only on PC and Mac devices. iOS and Apple TV users are out of luck for now.



  1. Click the Pair Through Phone button. Button will change to Pair with Bluetooth indicating that the Zwift Phone Companion app will be used. This is confirmed when the Phone icon is shown in the upper right corner of the screen. Click the Power Source box to continue. 

  2. Power Source Selection: Both Stages power meters and Stages Bike should be listed. Click on the Stages Bike to continue.

  3. Cadence Selection: Both Stages power meters and Stages Bike should be listed. Click on the Stages Bike to continue.

  4. Resistance Selection: Stages Bike should now be listed.  Click on the Stages Bike to a complete successful connection to the Stages Bike.

Workaround 2: Use ANT+ Dongle to make connections to the SB20

This workaround works only on PC and Mac devices. iOS and Apple TV users are out of luck for now.



  1. Ensure that Pair Through Phone button is displayed indicating Bluetooth pairing is active. Ensure ANT+ dongle is inserted and is functioning. Both are confirmed when the  ANT+ and Bluetooth icons are shown in the upper right corner of the screen. Click the Power Source box to continue. 

  2. Power Source Selection: Click the All button, Sages power meters and ANT+ Stages Bike should be shown. Click on the Stages Bike to continue.

  3. Cadence Selection: Both Stages power meters and and ANT+ Stages Bike should be shown. Click on the Stages Bike to continue.

  4. Resistance Selection:  ANT+ Bike should be now listed.  Click on the Stages Bike to a complete successful connection to the Stages Bike.
Summary

Connections via Bluetooth to the Stages SB20 Bike no longer function correctly starting with Zwift Release 1.104.0.  This causes problems for several thousand SB20 Bike users.  Zwift needs to address this widespread bug immediately.

Also: Ongoing problems with iOS devices have persisted for several years. For more details see: SB20 - Zwift Connection Error.

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