There's no shortage of ways to track your data while working out, especially when it comes to things like running and cycling. There's Runkeeper, Map My Ride/Run, Endomondo, Strava, and many others.
The speed sensor 2 attaches to the hub of either wheel and self-calibrates with your Edge cycling computer or compatible Garmin device to give you accurate speed and distance at all times — even ...
A cadence sensor is a compact cycling device that measures pedaling rate in RPMs to provide real-time feedback.