Originally Posted by
DrIsotope
Again, it wouldn't matter much (as if it matters much now) if I didn't put in ~10k miles every year. I estimate in the time I've had the 520, it's shorted me by more than an average person rides in an entire year.
Yeah, based on all that your 520 is the outlier.
Here's another strange one. I mapped out a route from my home on Strava, 28.03 miles and 3,836'. When I rode it my Garmin 500 reported 28.11 miles and just 2,684'. Again this is in South OC where I will typically see 10% to 20% difference with the mapping always higher. I'm inclined to think my Garmin is closer, because of things like the GMR ride where it was so close. Something screwy with S OC mapping data.