Every GPS bike computer can track your route and measure the speed and distance of your ride. The Polar M450 and the Garmin Edge 25 are two of our favorites for beginners. You could even use your phone and an app like Strava or MapMyRide to achieve this.

But if you’re serious about biking, you need to consider the Garmin Edge 520. It’s got a ton of features high-end riders would like, such as tracking functional threshold power (the maximum power you can sustain for an hour), estimating your VO2 Max and providing recommendations on how long it will take your body to recover from a ride. They definitely matter for me.

Other performance-oriented features include the ability to connect to Shimano Di2 electronic shifters and record gear changes, as well as integration with Strava to show on-device Segments in real time. There’s also support for ANT+ to pair with accessories (including Garmin’s Vector power pedals andrear-view radar system), as well as ANT+ FE-C, which allows the 520 to control smart bike trainers. In short, the Edge 520 allows a lot of flexibility with accessories, although it won’t work with Bluetooth heart-rate monitors.
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Read full post here:
https://www.cnet.com/reviews/garmin-edge-520-review/