Anyone who says Garmin's elevation calculations are borked, you are correct. Contrary to what Garmin tells me this ride was neither underground nor underwater. : r/Garmin
Edge 130 Plus elevation accuracy is poor following switch off and on in mid ride. - Edge 130 Plus - Cycling - Garmin Forums
Annemiek van Vleuten on Twitter: "Who can help me to solve problem with @ Garmin 520 Edge accurate elevation? I can change elevation but it changes immediately to 20000m 🤤. 'Mark location' is
Garmin Introduce Edge 1040 Solar GPS / Computer - Bicycling Australia
Barometric altimeter. Everything you need to know about altitude on GPS
Garmin Enduro Settings To Change For Elevation Gain Accuracy | SHIMWORLD