Just a quick heads-up to anyone thinking about getting the new Polar cs100 computer and adding a cadence sensor later. If you look at the specifications on the Polar web site, you might note that the cadence sensor is supported as an option. That is true; however, there is no way to display the real-time cadence on the cs100 during your ride. After the ride is over you can review the data and see the average cadence. But while you're actually riding, zip, nada, and zilch. For real-time cadence you have to spend the bucks for the cs200.
Stephen
Stephen