Originally Posted by
Looigi
True, though I imagine it's with the same caveats as using a 500, 705, 800 or 810 without a wheel sensor.
Correct. It's the exactly the same. It's the same issue with the fairly-popular Edge 200. The distance provided is more than good enough for the intended purpose.
Just hat exactly happens when you do that? I ride my garmin unit without a wheel sensor and it never really seems that off compared to others.
It's not as good but, probably, (more than) good enough.
Anyway, it's speed that is more of an issue. The wheel rotation sensor will be much more accurate for speed (over short distances).