Lezyne has released its Radar React front and rear lights, which use radar tech to alert you to cars approaching from behind.
The system is available as a Radar Drive single rear light or can be linked to the React Drive front light.
With the combined setup, the system doesn’t need to be used in conjunction with a GPS bike computer, with LEDs on the rear of the front-mounted React Drive light signalling when a vehicle is behind you.
The price for the single Radar Drive rear light is £100 / $179.99 / €169.95, with the React Drive front light priced at £170 / $124.99 / €119.99.
Both lights can be bought as a system for £250 / $279.99 / €259.99.
The rearview radar-equipped Radar Drive light can be used on its own or with Lezyne’s Radar Ally app to use the radar feature, removing the need for a bike computer or the React Drive light.
- What are rearview radar bike lights and should you use one?
- Best bike lights 2025 – our pick of the best front and rear lights to keep you visible out on the roads
Safer rear light
Lezyne says the Radar Drive provides increased safety even when not connected to the system, with the rear light using a special flash pattern when it detects a rear-approaching vehicle to improve visibility.
But as with Garmin’s Varia radar, it can be connected to a head unit to alert you to vehicles behind.
Lezyne says it can spot vehicles up to 150 metres away, and the device is able to detect how fast they are approaching.
If the vehicle is coming fast, the head unit or React Drive light will show a different set of visual cues to indicate that it may be dangerous.
The visual cues are shown via the translucent rear portion of the unit, lighting up when a car is behind you.
Changing lighting patterns indicate the distance to the approaching vehicle, with faster flashing indicating greater danger.
The React Drive front light doesn’t only show visual cues, with a built-in speaker giving audible alerts to vehicles passing.
Lezyne says the Radar Drive light is compatible with most GPS bike computers that support radar, or it can be used with the Radar Ally app.
The Radar Ally app also enables you to customise system alerts, control the front and rear lights, and check for system firmware updates.
The lights connect via ANT+ and Bluetooth, meaning they should work with a range of cycling computers.
Bright enough for the road
Both lights are IPX7-rated, so they should be able to keep you visible even on the wettest days.
Charging is via USB-C, with the front light having a claimed 70-hour max runtime and the rear 20 hours.
Lezyne says the React Drive front light has an output of 1,200 lumens on the maximum setting, which should be enough to navigate by on the road.
The rear light has a 300-lumen maximum output, which should ensure you're seen from far away down the road.
