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[Garmin Firmware ChangeLog]: What's New in 28.05 | Forerunner 255 Series

garminchangelogfirmware-updateforerunner-255

Overview

Garmin has released Software Version 28.05 for the Forerunner 255 Series. This stable release is now listed at 100% phased rollout.

Version 28.05 is a reliability update for race planning, Garmin Run Coach, display settings from Garmin Connect Mobile, Schwinn pairing, one-step workout previews, Garmin Connect activity uploads, and distance interval audio prompts.

Update Details

  • Device: Garmin Forerunner 255 Series
  • Software Version: 28.05
  • Channel: Stable release
  • Rollout Status: 100% phased rollout
  • Install Path: Menu > System > Software Update > Check For Updates
  • Official Announcement: Garmin Forums

Garmin Forerunner 255 Series 28.05 Changelog

Race, Coaching, and Garmin Connect Fixes

  • Improved race event syncing so events should no longer be missing or duplicated after being sent to the watch.
  • Fixed Garmin Run Coach week numbers showing differently on the watch and in Garmin Connect Mobile.
  • Fixed display settings changed from Garmin Connect Mobile not applying on the device.

Workout, Upload, and Device Fixes

  • Fixed Schwinn device pairing.
  • Fixed preview behavior for workouts with only one step.
  • Fixed some activities failing to upload to Garmin Connect.
  • Added completion time information to audio prompts for distance intervals.
  • Added other bug fixes and improvements.

Why This Update Matters

Better Race Event Sync

Race event sync fixes are important for runners who use Garmin Connect as a planning hub. Missing or duplicated race entries can make the watch less reliable during a training block.

More Consistent Coaching

The Garmin Run Coach week-number fix keeps the watch aligned with Garmin Connect Mobile, which helps avoid confusion during structured training.

More Reliable Daily Training

Schwinn pairing, workout preview, display settings, audio prompts, and upload fixes all reduce small interruptions around training setup and post-workout sync.

How to Get the Update

To check manually:

  1. Open Menu
  2. Go to System
  3. Select Software Update
  4. Choose Check For Updates

Garmin lists 28.05 at 100% phased rollout for the Forerunner 255 Series.

Conclusion

Garmin Forerunner 255 Series Software Version 28.05 is a stable maintenance update for runners who want cleaner race planning, better Garmin Run Coach consistency, more reliable uploads, and smoother workout handling.