I'am using Edge 820 now for approx. 3 month with unfortunenatly lots of troubles so far. Most troubles I could solve with the technical support, another not yet:
On all my bikes I have installed the GSC-10 cadence/speed sensor from Garmin. They are working with the Edge 820, but I miss the option at the Edge 820 device to enter the correct wheel size, which is nesessary that the speed is calculated properly.
I have observed a speed deviation of the edge 820 from around 5-7% upwards. Currently, the Edge 820 always shows a speed that is too high.
e.g. When I'am riding 40km/h (measured with a calibrated bicycle Computer), 42-43.5km/h is displayed, at 30km/h it's approx. 31,2-32,0km/h.
Before I was using Edge 820, the Garmin Edge 500 was my bike computer. This model had the option to enter the exact wheelsize and the speed was displayed properly. I had just a deviation of less than 1km/h, mostly only ±0,5km/h. This is acceptable, but more than 5% is really high.
Does anyone know, if it's possible to enter the correct used wheelsize on the Edge 820? If so, in which menu item is it located?
