We were talking to another rider on a similar trike as hers this past Sunday. He has a Garmin Forerunner 205 and she is already hinting for one as a Christmas present. I was looking at the Forerunner 405CX model and thinking of getting her that one. The 405CX is a wrist watch type with a heart rate monitor and much smaller than the 205. I can get the 405CX from Amazon for $253.75 with the optional cadence sensor. I guess the wireless can go on my hybrid and use the one on the hybrid for a spare. I have a wired Cateye Strada Cadence on my road bike because I also use the road bike on the trainer.