[Firmware ChangeLog]: What's New in 31.21 Beta | Edge MTB

Overview

Garmin has started the 20% rollout of Public Beta 31.21 for the Edge MTB. This beta is short and focused, with two official fixes: one for Daily Suggested Workouts appearing when disabled, and one for Stamina Distance/Duration.

For a mountain-bike-focused Edge device, this is not a flashy update. It is a usability and training-data cleanup release. That still matters because menu behavior and Stamina data both affect how the device feels during real rides.

Update Details

Device: Garmin Edge MTB
Software Version: 31.21 Beta
Release Date: April 22, 2026
Channel: Public Beta Program
Rollout Status: 20% rollout
Installation Path: Main Menu > System > About > Check For Updates
Source: Garmin Forums

Garmin Edge MTB Beta 31.21 Changelog

Garmin lists two fixes in version 31.21:

Fixed Daily Suggested Workouts showing on the main menu when toggled off
Fixed Stamina Distance/Duration

The changelog is brief, but it covers two areas that can show up during everyday use: the main menu and performance pacing data.

Why 31.21 Matters on Edge MTB

The main menu should reflect your training preferences

If Daily Suggested Workouts are turned off, they should not remain visible on the main menu. On a trail-focused device, riders often want quick access to maps, ride profiles, sensors, and navigation without training prompts they have already disabled.

Version 31.21 should make that behavior cleaner.

Stamina data matters on hard trail rides

Stamina is not only for road pacing. On mountain bike routes, effort can spike quickly across climbs, technical sections, and repeated accelerations. If distance or duration values are wrong, Stamina becomes less useful as a real-time pacing aid.

Garmin's fix for Stamina Distance/Duration should help keep those screens more trustworthy for beta testers.

Previous 31.xx Branch Context

Garmin also repeats earlier changes from the branch:

31.20 fixed crash paths, Connect IQ UI lag/freezing, course list stability, elevation profile scaling, weather widget values, and overlay menu behavior
31.18 fixed a translation issue that added "Day" to date strings
31.15 added gear tracking improvements and fixed radar color mode, false climb credit, auto zoom, Strava widget freezing, ClimbPro display, shifter summary, course navigation, and recent finds issues

That makes 31.21 another incremental stabilization step rather than a new feature launch.

How to Install Edge MTB 31.21 Beta

Garmin says you need:

Enrollment in the Public Beta Program
A configured Wi-Fi network on the device
To open Main Menu > System > About > Check For Updates

After the download finishes, you may need to manually select Software Update 31.21.

If the device shows "Collecting diagnostics...", Garmin asks users to go to:

Menu > System > Diagnostics > Upload RAM Dump

Should Edge MTB Beta Users Install It?

If you are already on the 31.xx beta branch, yes. This is a focused bug-fix update with practical value for menu cleanliness and Stamina data behavior.

If you are using Edge MTB for important rides, remember that this is still beta software. Install it when you have time to verify your ride profiles, sensors, and navigation setup before relying on it.

Conclusion

Garmin Edge MTB software version 31.21 Beta is a compact maintenance release. It fixes Daily Suggested Workouts appearing after being turned off and corrects Stamina Distance/Duration behavior.

For beta testers, this is a sensible update because it improves training workflow and data trust without introducing a large new feature surface.