Hi, I just recently got an Edge 500 paired with a GSC10. I just did a 40 mile ride, although the speed was very intermittent (sometimes zero and sometimes half my speed). For example, I would be going 20mph and then all of a sudden it would read 8mph, but I didn't change anything. I am pretty sure the total distance read shorter than the ride should have been. I have since tried riding my bike stationary and the speed seems to work fine. I am attaching the .fit file from my latest ride if anyone has any idea what happened.
Thank you, Joshua