Garmin speed sensor distance and speed accuracy - Joyful Triathlete
Garmin Speed sensor 2 & cadence sensor 2 - measurement and storage of speed, cadence, distance via ANT+ or Bluetooth LE. Mount on wheel hub. and Quarter Turn Edge GPS Computer mount :
Garmin Speed & Cadence Sensors V2 with ANT+/Bluetooth Smart: In-Depth Review | DC Rainmaker