I have given up on auto pause with my 500, it pauses me on climbs constantly even when I am going 4 mph and I have auto pause set on 1.5 mph. I have been having some issues with it recording segments so I'm trying it this way for the time being.
It is also showing 0% grade sometimes on climbs that are 15-20%.
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I may be fat but I'm slow enough to make up for it.