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Garmin Varia RearVue 820 Rearview Radar and Tail Light

by Garmin
trackbetter is a trusted Authorized Dealer for this brand. All purchases are eligible for full manufacturer warranty protection.
$299.99 - $299.99
$299.99
$299.99 - $299.99
$299.99

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The Varia RearVue 820 combines Garmin's most powerful radar with a 2 km tail light and automatic brake light. It detects vehicles up to 175 meters back, tracks vehicle size and lane changes, and pushes alerts to your Edge, Garmin watch, or the Varia app.

Garmin Varia RearVue 820 Rearview Radar and Tail Light

Garmin Varia RearVue 820 Rearview Radar and Tail Light

by Garmin
trackbetter is a trusted Authorized Dealer for this brand. All purchases are eligible for full manufacturer warranty protection.
$299.99 - $299.99
$299.99
$299.99 - $299.99
$299.99

Need Help?

Talk with an expert Need expert advice?

The Varia RearVue 820 combines Garmin's most powerful radar with a 2 km tail light and automatic brake light. It detects vehicles up to 175 meters back, tracks vehicle size and lane changes, and pushes alerts to your Edge, Garmin watch, or the Varia app.

The Garmin Varia RearVue 820 is a radar tail light that detects vehicles up to 175 meters away, stays visible for 2 km, and delivers alerts to your Edge computer, smartwatch, or smartphone.

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WHAT'S INCLUDED IN THE BOX?

Garmin Varia RearVue 820 Radar Tail Light

Mounting Kit

Charging Cable

Most Powerful Radar Detection Yet

The difference between a close call and a safe pass is how early you know a vehicle is coming. The RearVue 820 uses Garmin's most powerful and precise radar to detect approaching vehicles from up to 175 meters (more than 190 yards) away — earlier than any previous Varia model. The wider field of view captures more of what is behind you, giving you reliable alerts with enough time to move, adjust, or prepare before the vehicle reaches you.

  • Detects approaching vehicles from up to 175 meters (190+ yards) away
  • Wider field of view captures more of the road behind you than previous Varia models
  • Distinguishes between small, medium, and large vehicles so you know what is coming
  • Alerts you when a vehicle changes lanes and displays its threat level
  • Tracks vehicles traveling at the same speed, not just faster-moving traffic

Bright Tail Light and Brake Light

Being seen is not optional on the road. The RearVue 820 tail light puts out enough output to be visible from up to 2 km (1.24 miles) away in any riding condition. When you slow down or stop, the brake light activates automatically with a distinct flash pattern that signals your deceleration to drivers behind you — the same visual communication cars provide to each other, now on your bike.

  • Tail light visible from up to 2 km (1.24 miles) away
  • Brake light automatically activates when the unit detects you are slowing or stopping
  • Distinct brake light flash pattern communicates deceleration clearly to drivers
  • Up to 24 hours of battery life in day flash mode
  • 4 light pattern options: day flash, night flash, solid, and peloton mode

Alerts Across Devices and the Varia App

The RearVue 820 pushes alerts to whatever device you are already using on the bike. Pair it with a compatible Garmin Edge cycling computer for on-screen vehicle tracking and threat level data. Connect it to the Varia app on your smartphone for visual and audible alerts without a cycling computer. Pair it with a compatible Garmin smartwatch for haptic alerts on your wrist, with select models also delivering voice alerts for approaching vehicles so you never have to look down.

  • Compatible with Garmin Edge cycling computers for full vehicle tracking and threat level display
  • Varia smartphone app delivers visual and audible alerts without additional hardware
  • Compatible Garmin smartwatches provide haptic and voice alerts for approaching vehicles
  • Custom light patterns available through the Varia app on your smartphone
  • Peloton mode preserves the eyesight of riders behind you during group rides

Compact Design and Universal Fit

The RearVue 820 is designed to fit the bike you already ride. The new seatpost mount fits cleanly onto almost any road or gravel bicycle without adapters or modifications. The compact form factor keeps the unit tight to the seat post so it does not interfere with your riding position or bag setup. For riders using a seat rail system, the Varia seat rail mount kit is available separately for a fully integrated fit.

  • New seatpost mount fits almost any road or gravel bicycle
  • Compact, sleek design sits tight to the seat post without interfering with gear
  • Compatible with the Varia seat rail mount kit for seat rail installations (sold separately)
  • Pairs with Garmin Edge computers, Garmin smartwatches, and the Varia smartphone app
  • Up to 24 hours of battery life in day flash mode for long rides and multi-day touring

Garmin Varia RearVue 820 FAQs

Additional Information on Garmin Varia RearVue 820 Rearview Radar and Tail Light

Specs

ANT+: Yes, radar and bike lights

Bluetooth (BLE): Yes, radar and bike lights

Dimensions: 3.9" × 1.0" × 1.7" (98.9 × 25.9 × 43.2mm)

Weight: 3.2 oz (90g)

Water Rating: IPX7

Light Modes: Solid, peloton, night flash, day flash

Custom Light Mode Configuration: Yes, with Varia Mobile App

Lumens: 25 solid, 8 peloton, 40 night flash, 100 day flash

Battery Life: 10 hours solid, 15 hours peloton, 10 hours night flash, 24 hours day flash, 30 hours radar only

Viewing Angle: 220°

Visibility Distance: 1.24 mi (2km)

Vehicle Threat Classification: Speed, size and lateral range based

Maximum Vehicle Detection Range: 175 meters

Radar Beam Width: 60°

Varia App Compatibility: Yes