Fenix 7 cycling distance error - jumps to 8300+ km after a few minutes of riding

6196119 10 months ago

I've been getting an error where my cycling distance jumps to 8300+km after a short time (it should be about 22km for this route). For some reason it's always around 8300km. The other data points - time, speed etc are good but the distance is wildly off. If I stop the activity and immediately restart, it will record distance normally. The watch is 7 months old and used to measure this route acurately but this problem is coming up more and more and now it happens almost every ride. I frequently ride the same trail out and back and it almost always happens on the way out but never on the way back. Any suggestions?

I have tried:

Updating to the latest firmware

Waiting for a few minutes after it shows the GPS being connected before starting my ride

Starting the GPS a bit farther down the road from my normal spot

Cycling the watch power off / on

Thanks for any help you can provide.

0 #Matthias# 10 months ago

Do you have any sensors paired to the watch?

0 6196119 10 months ago in reply to #Matthias#

There were no sensors when the problem first came up. I did add a Garmin wheel speed sensor a couple weeks ago to see if that would help…it didn’t.

0 #Matthias# 10 months ago in reply to 6196119

That makes it even stranger. Could you share a fit file if such a faulty activity recording?

0 6196119 10 months ago in reply to #Matthias#

Here is the data screen from my last ride. It seems that this forum won't allow me to share the actual fit file. I stopped the activity after noticing it was measuring distance incorrectly and restarted. It worked fine for the rest of the ride. It's strange to see that the speed graph shows my true speed but it still says my average speed was supersonic. Thanks for your help with this.

Garmin Connect.pdf

0 mcbit 10 months ago in reply to 6196119

Sharing a fit file should be possible. Alternatively could you share the data screen with the distance tab activated rather than time.