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Garmin Varia RVR315, front of the black radar unit
Garmin Varia RVR315, angled front, rounded black unit
Garmin Varia RVR315, side profile
Garmin Varia RVR315, side with blue light lit
Garmin Varia RVR315, back plate with mounting slots and logo
Garmin Varia RVR315, close view of the mount base
Garmin Varia RVR315, phone showing the app welcome screen over a road photo
Garmin Varia RVR315, phone showing a map screen with a radar alert
Garmin Varia RVR315, front of the black radar unit
Garmin Varia RVR315, angled front, rounded black unit
Garmin Varia RVR315, side profile
Garmin Varia RVR315, side with blue light lit
Garmin Varia RVR315, back plate with mounting slots and logo
Garmin Varia RVR315, close view of the mount base
Garmin Varia RVR315, phone showing the app welcome screen over a road photo
Garmin Varia RVR315, phone showing a map screen with a radar alert

Garmin Varia RVR315 Rearview Radar

by Garmin
$149.99 - $149.99
$149.99
$149.99 - $149.99
$149.99

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Garmin Varia | Stay aware of approaching cars

Garmin Varia RVR315 Rearview Radar

The Garmin Varia RVR315 Rearview Radar is a small rearview radar for your seat post that alerts you to cars approaching from behind, with a visual and audible warning as they close in. At 51 g, it is a radar only, with no built-in light. Without an Edge on the bars, you can use the Varia app on your phone as the display. The radar covers a 40 degree beam and tracks up to eight vehicles at once. You get up to 7 hours on a charge.

Garmin Varia RVR315, the compact rearview radar unit

Radar for the road behind

How it works

Maximum awareness
Varia RVR315 rearview radar provides visual and audible alerts for vehicles approaching from behind up to 153 yards (140 meters) away.
Speed range
The radar responds to approaching cars at 6 to 99 mph (10 to 160 km/h).

Setting up the RVR315

How to use it

Garmin Varia RVR315, paired with the Varia app
Varia app

Works with the Varia app

This smartphone app helps you increase your awareness by providing graphics, plus tone and vibration alerts, to indicate the position and speed of approaching cars.

Garmin Varia RVR315, the mounting plate for the seat post
Mounting

Compact design

Easily mount this sleek, compact device on the seatpost of almost any road-use bicycle. The vertical design allows for better leg clearance and a perfectly comfortable ride.

See the RVR315 at work

Videos

Rearview radar options

How it compares

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Garmin Varia RCT715 Radar Camera Tail Light
Rearview radar and tail light with a built-in camera that saves footage of an incident.
1080p camera 140 m radar range Up to 6 hr day flash with recording
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Garmin Varia RearVue 820, radar tail light with the light on
Garmin Varia RearVue 820
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170 m radar range Up to 24 hr day flash Brake light
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Garmin Varia RTL515, radar tail light with the light on
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Rearview radar and tail light that pairs with an Edge or the Varia app.
140 m radar range Up to 16 hr day flash Peloton mode
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Garmin Varia RVR315, compact rearview radar unit in black
Garmin Varia RVR315 Rearview Radar
Compact rearview radar that alerts you to vehicles approaching from behind.
140 m radar range Up to 7 hr battery 51 g
Currently viewing

Varia RVR315

Frequently asked questions

Cars and other vehicles coming up from behind, as far as 153 yards (140 m) back. The radar does not detect vehicles traveling at the same speed as your bike. The device can improve situational awareness. It is not a replacement for cyclist attentiveness and good judgement.
Up to 7 hours of riding on a charge. It charges from the power cable in the box.
No, it is a radar only, with no light built in. The Varia RTL515 adds a tail light to a rearview radar.
Yes, on almost any road-use bicycle, with shims in the box for round, aero and D-shaped posts.
Yes. With a compatible smartphone, the radar alerts can overlay your maps in apps such as Ride with GPS.
Yes. The IPX7 rating means it withstands incidental exposure to water of up to 1 m for up to 30 min.
The RVR315 radar, the mounting hardware, a power cable and documentation.
Garmin backs it with a one-year limited warranty from the date of purchase against defects in materials or workmanship, and Garmin repairs or replaces defective components.
  • Dimensions: 2.8 x 1.8 x 0.8 in. (72 x 40 x 20 mm)
  • Weight: 1.8 oz (51.0 g)
  • Battery life: Up to 7 hours (active mode)
  • Battery: Built-in lithium-ion, rechargeable
  • ANT+: Yes (radar)
  • BLE: Yes (radar)
  • Water rating: IPX7
  • Rear radar: Yes
  • Detection range: Up to 153 yards (140 m)
  • Beam width: 40 degrees
  • Vehicle approach speed: 6 to 99 mph (10 to 160 km/h)
  • Varia app compatibility: Yes
  • Operating temperature range: -20 C to 50 C
  • Charging temperature range: 0 C to 40 C
  • Reliable radar: The Varia RVR315 Rearview Radar is a reliable rearview radar that alerts you to cars approaching from behind.
  • Riding with radar: If the radar is not connected or not sending radar data, stop riding and check the devices in a safe location.
  • Coverage: Up to eight vehicles at once, across a beam 40 degrees wide.
  • No Edge needed: If you don't have an Edge or other compatible device yet, the Varia app has you covered.
  • Small and easy to mount: The Varia RVR315 is small, it's easy to mount, and it works with just about any bike.
  • Battery life: Get up to 7 hours of battery life.
  • RVR315
  • Mounting hardware with round, aero and D-shaped seat post shims
  • Power cable
  • Documentation