Garmin and Strava

N3river 2 days ago

Garmin and Strava showing large discrepancy on avg speed. I’ve used garmin and strava for years and never had this issue before. Strava shows avg speed of 16.4 and Garmin shows 19 avg speed and 19.2 avg moving speed so not sure where the 16.4 is coming from.

0 trux 2 days ago

Looks like a problem at Strava. At the distance 29.14 miles and time 1:31:52, the speed 19.0 mph as shown in GC, is correct.

29.14 mi / 1:31:52 = 29.14 mi / ((91*60+52 s) / 3600s) h = 29.14 mi / 1.53 h = 19.045751634 ~= 19.0 mph

Apparently they started to use the Elapsed Time, instead of the Total Time (like Garmin does), or the Moving Time (like Strava did previously). When you calculate the speed with the elapsed time, it gives indeed the speed they show:

29.14 mi / 1:46:47 = 29.14 mi / ((106*60+47 s) / 3600 s) h = 16.3733416576 ~= 16.4 mph