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Garmin 830 short distance compared to 810

Hello,

I was riding with a couple of friends over the weekend. Ron has a Garmin 810 and Keith has a Wahoo. My Garmin is the new 830 and it appears to show about 13% fewer miles than Ron's 810. See Strava file here: https://www.strava.com/activities/2532252392

When I look at my track, it appears to drop GPS recording and straight-line data points. See here:

If I compare Ron's tracking (bright green/yellow line) - he tracks more closely to the trail profile and doesn't have straight line data points on a curvy trail. See here:

Anyone know what's up with this and why I'm losing miles? Seems I was somewhat off on course finding as well (perhaps a related issue?)

Gale

0 paulmac999 over 5 years ago

I had this when comparing to a edge 800.

I updated my GPS chip firmware to the beta 2.42 and it is much better now, but still not quite as good as my 800.

I'm using GPS + Gonlass, where the 800 only has GPS, that's progress for you.

0 aweatherall over 5 years ago

Are all units using GPS for distance or do some of them have a speed sensor connected?

0 galebernhardt over 5 years ago in reply to paulmac999

Thanks Paul. I had updated firmware prior to the ride, so I'm disappointed to see the straight-line errors. I replaced my 800 with the 830 and if the 800 is more accurate...well...not progress.

0 galebernhardt over 5 years ago in reply to aweatherall

All units (830, 810 and Wahoo) were using GPS. The Wahoo and 810 were close and no straight-lining for either of them.

0 paulmac999 over 5 years ago in reply to aweatherall

My one also has no other connected sensors

0 aweatherall over 5 years ago in reply to galebernhardt

If you were using GPS+Galileo then that has been down since last Friday so would cause issues.