PowerTap's Bluetooth Smart Dual Speed/Cadence Sensor gives you the ability to monitor your speed and cadence with your favorite Bluetooth-compatible device. It's sleek and easy to mount on your frame.
Sigma's replacement spoke magnet fits standard spokes and works with Sigma speed sensors.
Start your engine and see if you can get the holeshot! Sunlite's Speedometer is a nice touch for a classic ride. It works and looks just like a car speedometer.
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