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Difference in elevation gain

I am riding with my friend. We always do yhe same corse together and in the end there is a large difference in elevation gain. I have the descent mk1 and he has the vivoactive 3 music. Can anyone help?

0 trux over 5 years ago

Barometric altimeters will always give you results with an extremely wide margin of errors, especially on a bke, where the gusts of wind apply air pressure on the sensor (regardless if true wind, or speed wind during fast descents). You can improve it a bit by protecting the watch with a sleeve, sweat wristband, tape, or similar. Also using the auto-calibration during activity may help a bit, but it does not seem to be auto-calibrating too frequently anyway. The best solution is enabling the Elevation Correction option on the activity page in Garmin Connect Web - the elevation profile is then recalculated using the topographic data, and as long as the GPS track fits well, it is usually much more accurate than the barometric altimeter.