I am in the Air Force, and I am stationed on Okinawa Japan. There are 2 local rides on saturdays put on by a guy who has bike shop out of his house in base housing. one is advanced, and the other is for beginners. I am attending the beginners one. the only reason I asked about the computer being a little bigger, is because most people on road bike are worried about wieght. and I didnt want to show up in the morning and get laughed at because of a bulky gps strapped to my handle bars. its the one I use on my Mtn bike. I had another cateye available, so I figured I would ask. I apreciate your concern, but I will not hurt myself or others tomorrow in the ride.