UDH – bikes with a UDH derailleur will require a Restrap Switch UDH adaptor (available separately)

whether your roads are wet or dry

the Astr RS helps racers conserve energy and hit the finish line with more power than the competition

Keeps the ring from getting muddy

Weight: 225 g

magene h603 heart rate monitor Mog UDH – bikes with aThe Magene H603 Heart Rate Monitor (Chest) helps you accurately monitor your heart rate while exercising. Key Features of the Magene H603 Heart Rate Monitor (Chest): Accurate Real time Heart Rate Monitoring Choose between various colors Split chest strap design to bring you a better product experience Long Battery Life, Lasts for 1000 Hours Support Dual Protocol of ANT+ and Bluetooth allows connection to most devices.