I use a flight deck on my road bike. For some reason it is backwards for the rear cassette, shows the 12 as the 25 and the 25 as the 12. There is only one way to install, so don't know why this would happen.. Needless to say, the virtual cadence is not right. I bought a Blackburn Delphi 4.0 for my new tourer, it has wired cadence and wireless speed/distance, for $59. Used only twice so far, is a little complicated cpmpared to the flight deck. I dp like the flight deck, though.