I have a Polar 725 and the bike speed is showing as very fast (and I know it isn’t right with me riding). The wheel size and mph/kph is both set correctly so curious if anyone has any other suggestions. Thanks.
not sure what magnet you are using, try a smaller one. I have heard that a bigger magnet can trouble trip the switch inside the speed sensor. I know Polar changes magnets to one with a screw to a slide on with plastic sleeve.