R-Guard Alloy USB 90 lm

The Author R-Guard Alloy USB represents a revolution in road cycling safety. This premium rear light combines a smart 90 lm cycling radar, a powerful flasher, and an automatic brake light. Thanks to its aluminum alloy body and advanced technology, it is the ultimate guardian for your daily commutes and intense training rides.

Key Features

• Active Radar Protection: The radar detects approaching vehicles from up to 140 meters away at a 40° angle. The built-in loud speaker and strong 90-lumen strobe LED light immediately alert both you and the driver behind you.
• Intelligent Brake Sensor: When slowing down or braking, the light ring automatically brightens to its maximum output of 50 lm, providing a clear warning to anyone behind you.
• Smart Modes & Power Saving: Features an Auto ON/OFF function that triggers based on movement. Easily toggle between automatic and manual modes with a simple double-click of the power switch.
• Safe Ride Home Function: Never worry about being left in the dark. When the battery runs critically low, the light automatically switches to a 5 lm eco-flash mode to provide an additional 30 minutes of runtime.
• Premium Alloy Craftsmanship: The aluminum alloy case combined with polycarbonate plastic ensures high impact resistance and a sleek look. With an IP64 waterproof rating, it performs reliably even in heavy rain.
• Universal Magnetic Mounting: The package includes two magnetic brackets—one for the seatpost (fits both round and aero profiles) and one for the saddle rails. Removing the light for charging via the modern USB-C port takes just a second.

Light Modes & Runtime

• High Constant: 30 lm – 5 hours
• Low Constant: 15 lm – 11 hours
• DayFlash: 50 lm – 10 hours
• NightFlash: 20 lm – 14 hours
• Breathing: 30 lm – 9 hours

Technical Specifications

• Radar alarm light brightness: 90 lm
• Rear light ring brightness: max. 50 lm
• Brake light brightness: 50 lm
• Radar detection distance: up to 140 m
• Radar detection angle: 40°
• Radar alarm system: built-in loud speaker + strong strobe LED light
• Battery capacity: 1100 mAh
• Charging port: USB-C
• Material: Aluminium alloy case + polycarbonate plastic
• Waterproof level: IP64
• Product size: 80 × 30 × 23 mm
• Net weight: 62 g
• Included brackets: magnetic seatpost bracket + magnetic saddle rail bracket
• Seatpost compatibility: round and aero seatposts