Garmin

Varia RearVue 820 Radar Taillight

Garmin Varia RearVue 820 combines a bright, road-ready taillight with rearview radar to help cyclists manage traffic with earlier, clearer awareness than a light alone. It detects vehicles approaching from behind and relays alerts to a compatible Garmin Edge bike computer, other compatible Garmin devices, or a supported smartphone—an effective upgrade for riders who train or commute on open roads where closing speeds matter.

Key advantages for road and mixed-surface riding

1. Rearview Radar Alerts - Notifies the rider of vehicles approaching from behind up to 153 yards (140 meters) away, supporting smarter lane positioning and safer decision-making.
2. Device Pairing Flexibility - Pairs with compatible Garmin Edge computers, other compatible Garmin devices, or a compatible smartphone for easy integration into existing setups.
3. Varia App + Vibration Alerts - When used with a compatible smartphone, the Varia app adds vibration alerts and additional awareness cues without requiring a dedicated head unit.
4. Daylight Visibility - Taillight is visible in daylight up to 1 mile, increasing the chance drivers recognize the rider sooner.
5. Compact Vertical Mounting - Slim, vertical design mounts on most road-use bicycles, keeping the radar/taillight package centered and unobtrusive.
6. Peloton Mode - Provides a low-intensity flash intended to be more comfortable for riders behind when traveling in a group.