Software version 27.09 is now available for the Forerunner 255 series. You may manually download this software update by following the path below: Menu > System > Software Update > Check For Updates Change Log Fix some lag when scrolling in the activity summary menu. Fix some possible crashes during swim activities. Fix an issue where race time prediction could be missing from a Garmin Coach plan. Various bug fixes and stability improvements.

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Forerunner 255 Series Software Version 27.09 - 50% Phased Rollout

Software version 27.09 is now available for the Forerunner 255 series. You may manually download this software update by following the path below:

Change Log

Fix some lag when scrolling in the activity summary menu.
Fix some possible crashes during swim activities.
Fix an issue where race time prediction could be missing from a Garmin Coach plan.
Various bug fixes and stability improvements.