I own a Garmin 520 plus and a Garmin 130 plus, and use both with a garmin cadence sensor 2. Both yield low "cadence averages" after each ride. With the 520 plus, I average 65 rpm, and 60 rpm with the 130 plus. Now, with my Bryton devices 750 and 420 with their sensor, I average 80 rpm. It is noticeable that on my Cobi app with my Trek 8s, I also average 80 rpm. Both the 520 plus and 130 plus are set to exclude zero. Thanks for the help.