See rearward vehicle alerts and add a braking signal with the Garmin Varia RearVue 820. Its radar detects approaching vehicles at up to 175 metres, and the tail light displays a distinct flash pattern when it detects slowing or stopping.
Vehicle detail on compatible displays
With the latest compatible Edge cycling computers or the Varia app on a smartphone, alerts can show small, medium and large vehicles, lane changes and threat level. Visual and audible radar alerts require compatible paired equipment.
Same-speed vehicle tracking is limited or may be unavailable at slower speeds or when the radar cannot detect the road, including in snow, ice, heavy rain, with obstructions or incorrect mounting.
Choose your lighting pattern
Use solid, peloton, night-flash or day-flash mode, or customise patterns in the Varia app. Garmin states up to 24 hours in day-flash mode and up to 30 hours in radar-only mode; runtime depends on settings and use.
| Manufacturer-stated radar range |
Up to 175 m |
| Radar beam width |
60 degrees |
| Light output |
25 lumens solid; 8 peloton; 40 night flash; 100 day flash |
| Stated runtime |
Up to 10 h solid; 15 h peloton; 10 h night flash; 24 h day flash; 30 h radar-only |
| Dimensions |
98.9 × 25.9 × 43.2 mm |
| Weight |
90 g |
| Water rating |
IPX7 |
| Part number |
010-03180-00 |
A mounting kit is included. The compatible Varia seat-rail mount kit is sold separately.
In the box
- Varia RearVue 820 radar tail light
- Mounting kit
- Charging cable
- Documentation
Check mounting and display compatibility, then follow the supplied documentation for positioning, charging and operation.
