Introduction
The LEZYNE Radar Drive Rear LED Bike Light is a high-performance taillight designed to enhance rider safety and visibility. It features advanced radar-based vehicle detection, disruptive daytime flash patterns, and powerful night riding lumen outputs. This system detects rear-approaching vehicles from up to 150 meters away, providing real-time notifications. It can operate independently or pair with the LEZYNE React Drive front light, compatible GPS bike computers, or the LEZYNE Radar Ally smartphone app for comprehensive situational awareness. The light is built with IPX7 waterproof construction and is USB-C rechargeable, ensuring durability and long-lasting performance in various riding conditions.
Key Features
- Radar-based vehicle detection up to 150 meters.
- 300 lumens maximum output with 7 versatile modes.
- IPX7 waterproof construction.
- Up to 20 hours runtime.
- USB-C rechargeable.
- Multiple device connection options (React Drive Front, GPS computers, Radar Ally app).
- Adaptable mounting with secure strap and adapters.

Figure 1: The LEZYNE Radar Drive Rear LED Bike Light, a compact and durable device designed for enhanced cycling safety.
Setup
1. Initial Charge
Charge the Radar Drive Rear light fully using the provided USB-C cable before its first use. A full charge ensures optimal performance and battery life.
2. Mounting
The Radar Drive Rear light attaches securely to your bicycle's seatpost. Use the provided mounting strap and select the appropriate aero or D-post adapter for your seatpost shape. Ensure the light is positioned correctly to allow for optimal radar detection of rear-approaching vehicles.

Figure 2: Various mounting adapters included for different seatpost shapes, ensuring a secure fit.

Figure 3: The Radar Drive Rear light securely mounted on a bicycle seatpost, ready for use.
3. Pairing with Devices
The Radar Drive Rear can be paired with other devices for enhanced functionality. This includes the LEZYNE React Drive front light, compatible GPS bike computers, or the LEZYNE Radar Ally smartphone app. Refer to the official setup tutorial video for detailed pairing instructions.
Video 1: Official LEZYNE Radar React System Setup Tutorial. This video provides comprehensive instructions on how to set up and pair your LEZYNE Radar React System components, including the Radar Drive Rear light, with other devices and the companion app.
Operating Instructions
1. Power On/Off
To power on the Radar Drive Rear light, press and hold the power button located on the device. To power off, press and hold the power button again.
2. Mode Selection
The light offers 7 versatile modes. Short-press the power button to cycle through the available modes, including High, Medium, Low, Night Flash, Day Flash, Car Alert Flash, and Car Alert Solid. Each mode provides different brightness and flash patterns suitable for various riding conditions.

Figure 4: Detailed specifications and available light modes for the Radar Drive Rear, including lumen output and runtime for each setting.
3. Radar Detection and Alerts
The integrated radar system continuously monitors for rear-approaching vehicles up to 150 meters away. When a vehicle is detected, the light will automatically adjust its flash pattern (e.g., Car Alert Flash) to increase your visibility. Real-time visual and/or audio alerts will be provided through any paired devices (React Drive front light, GPS bike computer, or Radar Ally app).
4. App Control
For advanced control and customization, download the LEZYNE Radar Ally smartphone app. The app allows you to manually control light modes, adjust settings, and receive real-time alerts directly on your phone.
Maintenance
1. Charging
The Radar Drive Rear light is equipped with a USB-C charging port. Connect the provided USB-C cable to the light and a suitable power source to recharge. The light's indicator will show charging status. A full charge provides up to 20 hours of runtime depending on the selected mode.
2. Cleaning and Storage
To clean the device, gently wipe it with a damp cloth. Avoid using abrasive cleaners or harsh chemicals that could damage the light's housing or lens. Store the light in a cool, dry place away from direct sunlight when not in use for extended periods.
Troubleshooting
N/A - No specific troubleshooting information is provided in the product details.
Specifications
| Color | Red |
| Brand | LEZYNE |
| Material | Multi |
| Power Source | Battery Powered |
| Water Resistance Level | Waterproof (IPX7) |
| Item Weight | 0.78 Pounds |
| Mounting Type | Seatpost Mount |
| Number of Settings | 7 |
| Brightness | 300 lumen |
| Max Runtime | 20 hours |
| Model Number | 1-LED-43R-V104 |
Warranty
This product comes with a Limited Warranty. Please refer to the product packaging or the official LEZYNE website for detailed warranty terms and conditions.
Support
For further assistance, product information, or to explore other LEZYNE products, please visit the LEZYNE Store on Amazon.





