The Radar Drive detects vehicles by transmitting out low powered radio waves, and detecting the changes in how those signal bounce back. The system then processes those signals to identify vehicles approaching you, and how fast they are approaching. This information is then transmitted to the Lezyne Radar Ally app, or a compatible GPS cycling computer with ANT+ radar compatibility to display it graphically. Up to 8 contacts can be tracked simultaneously.

Approaching vehicles can be detected by the Radar Drive up to 150 m (492 ft) away. The primary detection area behind you extends out at a total angle of 35º, but the system can still detect objects at larger angles with some reduced sensitivity.

Cars are not the only vehicles that can be detected by the Radar Drive. The system may also detect approaching cyclists, and even approaching foot traffic. You do need to have a clear line of sight to these contacts however, as detection is line of sight. Radar signals will be blocked by structures, stationary vehicles, or geography (i.e. road curves).

If you have any other questions about how the Radar Drive detects vehicles, please submit a request for help.