My girlfriend has a 4s and it is connected to a Garmin speed sensor when cycling indoor.
The sensor is also connected to my old Edge800 computer.
There is a huge difference in the speed shown on the Edge and the V4S while an activity is started - Edge shows 18km/h and V4s shows only 12km/h
Both devices have the wheel size manually set to 2155. But the speed difference is huge,
I've also added the sensor to my Fenix 6, set manually the same wheel size and ran a test activity. It shows the same speed on Edge and Fenix6.
So it seems it's something with the V4S. But what could be the issue?
Did any of you had similar issue?