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Garmin

Varia RearVue 820

A safety upgrade for a road cyclist who rides on busy roads.

American brand

Where to buy

We do not sell this. These are the shops where we checked it, by country. Prices change; the shop's page is always the final word.

Sold to: United States, Canada, United Kingdom, Australia. We may earn a commission if you buy through these links. How we make money

Why it made our lists

  • Gifts for cyclistsWorth the splurge

    For a road cyclist who rides on busy roads. A rear light with radar that warns of cars coming from behind. It works best with a Garmin bike computer or watch; the phone app is less handy mid-ride.

  • Gifts for a dad who has everything

    A rear bike light with radar that warns of cars coming up behind. For a dad who rides on busy roads and already owns a good bike. Works best with a Garmin bike computer or watch.

  • Gifts $200 and up

    A rear light with radar that warns of cars coming from behind. A safety upgrade for a road cyclist on busy roads. Works best with a Garmin bike computer or watch.

What it is

A rear bike light with built-in radar that detects cars approaching from behind. Alerts appear on a compatible Garmin bike computer or watch, or in the Varia phone app.

A rear bike light with built-in radar that mounts on the seatpost. It detects cars approaching from behind and sends alerts to the Varia phone app, a Garmin Edge bike computer or a compatible Garmin watch, including the size of the vehicle. The light has a brake signal and four flash or solid modes. It mounts with a new seatpost mount.

The details

Radar range
Up to 175 m, 60 degree beam
Light visibility
Up to 2 km
Battery
10 h solid, 24 h day flash, 30 h radar only
Size
98.9 x 25.9 x 43.2 mm
Weight
90 g
Water rating
IPX7

From the shop's product page, read October 3, 2026.

Worth knowing

Most useful with a compatible Garmin head unit; the phone app alone is less convenient mid-ride.

Skip it for a rider with no smartphone, Edge computer or Garmin watch, since the alerts need one of them.

Good for
Partner, Dad, Friend, Has everything
Interests
Cycling, Tech & gadgets
Occasions
Christmas, Birthday, Father's Day

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