Quote Originally Posted by GLC1968 View Post
Oh, another 'down side' is that the speed sensor must be within a certain distance of your computer to transmit correctly, so you cannot mount it on the rear wheel (for speed/distance on a trainer). The cadence sensor will still work on a trainer though!
I have the 710, predecessor to the 720. My speed sensor is on the back wheel and works just fine. I do mount the watch to my handlebars.

V.