Strava or Garmin ???

[Nigelnaturist]

Interesting as I have had the opposite result when comparing Mapping with and Android phone and a Garmin, Garmin always shows faster time when in reality we were wheel to wheel. Also Garmin always shows more climbing.

I have a Bryton now, does like a Garmin but much cheaper. It seems to match the pace part now but the Garmins always show about 10% more on the climbs.

Try uploading data to different sites, I can upload the trace to Garmin connect, Endomondo, Bryton and Strava, all the stats vary!

Its down to the algorithms each site uses, the most accurate way to get speed distance and time (and this varies from site to site) is to use a speed sensor, as this should accurately measure the distance covered, gps plots can be several feet out and jump quite wildly sometime (hence high max speeds).