Forerunner 255 - Wrong accuracy on tracks

azzisp 12 days ago

Hi everyone, I'm having an issue with my Garmin Forerunner. It's significantly overestimating the distance of my track workouts. For instance, on a 250m track, it consistently measures around 270m, which completely throws off my pace calculations during interval training.

Does anyone have any suggestions on how to fix this problem?

Thanks !

0 Lewis 12 days ago

Try to config the GPS mode to auto, it will help to take the better signal of GPS in the moment

0 8387456 11 days ago

Same problem, HR and GPS is useless now

0 ovekvam 11 days ago

This is a general issue for all GPS systems. Because of filtering, the distance in corners will be slightly off. That is why Garmin made the track mode and have lots of tracks stored in their database. Most of them are probably 400m, but the issue is more noticeable on shorter tracks.

0 azzisp 11 days ago in reply to ovekvam

Yes, it's understandble, but my friend whi IS running with me and has an old fenix 3 doesn't have this issue, or not in the same proportions AT all...

0 ovekvam 11 days ago in reply to azzisp

That is strange. The FR255 GPS accuracy is generally very good.

0 Lewis 11 days ago in reply to azzisp

Use track mode, and all systems of GPS, also in data recording instead of intelligent change to every second, this must change the result