Garmin Edge 520 HRM

Edge 520 is the first bike computer that's compatible with Strava live segments and includes a 3-month trial of Strava Premium. With this membership, your starred Strava segments automatically sync with the 520 for live feedback during your ride. You'll also get alerts for segment start and finish and leaderboard rankings once you complete the segment.
Need some motivation to get through those lonely miles on the indoor trainer? Edge 520 delivers with a suite of training capabilities when paired with compatible ANT+ indoor trainers. Let's say you want to train at an average power of 240 watts. Just set the target on Edge 520, start pedaling, and the trainer will automatically adjust to keep you at your target while the 520 shows your stats. You can also follow a course that you or another rider created and literally race the recorded stats, with the trainer adjusting resistance to match the elevation profile.
Edge 520 compromises nothing when it comes to display - 2.3 inches of high-resolution color. Garmin maximized the display so you get the most live area in relation to the compact size of the 520. You'll also appreciate the screen clarity in all lighting conditions.