Knowing a car is approaching from behind changes how you ride—you can hold your line confidently, signal clearly, or move right without the startle of an engine suddenly beside you. The Lezyne Radar React System builds that awareness into a front and rear light set, with the Radar Drive tail light scanning up to 150 meters behind you and sending alerts forward to the React Drive headlight. When a vehicle enters the detection zone, LED indicators on the front light flash and an audible tone sounds, giving you advance warning without turning your head or checking a screen.

The integration between the two lights is what sets this system apart from running a separate radar unit and light. The Radar Drive and React Drive pair wirelessly and function as a unified system—the rear light handles detection and visibility while the front light serves as both your primary illumination and your alert display. No phone mount required, no GPS computer necessary. The alerts come through the light that's already in your field of view.

That said, the system also connects to the Radar Ally smartphone app and compatible GPS computers via ANT+ and Bluetooth if you want additional display options. The app lets you control light modes on both units, adjust settings, and provides a visual representation of approaching traffic. Initial pairing requires a smartphone, but once configured, the lights work independently as a paired system.... Read More