Garmin GSC 10 Speed and Cadence Sensor

The Garmin® GSC 10 Speed and Cadence sensor measures your pedaling strokes per minute, providing valuable cycling training feedback. Performance cyclists know it's more efficient energy usage to maintain a set cadence than chase a set speed over varying terrain; GSC 10 makes it easy. Self-calibrating, wireless unit works with Garmin Forerunner 50, 305, 405, Edge® 305 and Colorado GPS units. Weighs 1.3 oz. and measures 2.75 x 1 inches.