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  • Garmin Varia RTL510 Radar Tail Light
  • Garmin Varia RTL510 Radar Tail Light Back
  • Garmin Varia RTL510 Radar Tail Light Side
  • Garmin Varia RTL510 Radar Tail Light Detail
  • Garmin Varia RTL510 Radar Tail Light Side
  • Garmin Varia RTL510 Radar Tail Light Top
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GarminVaria RTL510 Radar Tail Light

Item # GRM009F

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  • Black, One Size ($199.99)
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Item # GRM009F

Visualize traffic without taking eyes off the road.

There's nothing that's going to magically make all the vehicles on the road disappear, but at least you'll be able to visualize how fast they're approaching while simultaneously alerting them of your existence with the Garmin Varia RTL510 Radar Tail Light. This seatpost-mounted tail light is equipped with a radar unit that detects traffic from up to 153 yards behind you, so you'll never have to look over your shoulder, only to swerve to the side of the road as a vehicle speeds past you with reckless abandon.

This tail light delivers 220-degrees of red illumination that's seen up to a mile away by rearward traffic, so you'll easily be spotted by traffic, regardless if you're riding in the city or countryside. It pairs with Garmin's separately available head units, watches, and eyeglass attachments to provide a visual indicator of just how close and fast rearward traffic is approaching. Among these compatible devices are the ever-popular Edge series of head units, Phoenix series of watches, and Varia Vision In-sight Display that neatly attaches to your glasses.

  • Radar-equipped tail light spots traffic as it approaches
  • This version is Varia RTL510 light only (no radar display)
  • Pairs with Garmin devices to give visual traffic indicators
  • Provides 220-degrees of red illumination to rearward traffic
  • Solid, Night Flash, and Day Flash provide light customization
  • Lasts up to 6 hrs in Solid/Night Flash and 65 hrs in Day Flash
  • Includes seatpost mounting kit and charging cables

California Proposition 65


Cancer and Reproductive Harm -

Tech SpecsWeight
Tech Specs
Cancer & Reproductive Harm -
Solid, Night Flash, Day Flash
[Solid] 20, [Night Flash] 29, [Day Flash] 65
radar alerts you of vehicles approaching up to 153 yards away, tail light is visible up to a mile away
Burn Time
[Solid] 6 hours, [Night Flash] 6 hours, [Day Flash] 65 hours
seatpost mounting kit
IPX-7 rating (submerged one meter for 30 minutes)
Varia RTL510, mounting kit, cables
3.9 x 0.8 x 1.6 in
Recommended Use
commuting, road cycling
Manufacturer Warranty
1 year

Claimed Weight

Claimed weights are provided by the vendor.

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71 g

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Less Looking Over Your Shoulder

  • Familiarity: I've put it through the wringer

I've had this product for a while now. It is very effective out on the road. You can ride out in the smoother part of the lane and get audible warnings of approaching vehicles on your Garmin Edge, as will as depiction of the vehicle(s) on the screen in red, and a green all clear when they have all passed. The flash rate also increases to help catch the driver's attention when the radar senses them. Very few false alerts. Nice, bright, and rechargeable. Solid construction as with most Garmin devices. Much more effective than the previous version. You need all the protection you can get when road cycling with all of the distracted drivers out there.

Unanswered Question

Will this work with an older Garmin 510?

Does this sync and work with a Garmin 520?

Hi Paul, the Varia RTL510 will indeed work with the Edge 520.