Quick Summary
The Garmin Varia RTL515 Rearview Cycling Radar with Tail Light is a cycling safety accessory that helps you stay aware of vehicles approaching from behind. It is designed to pair with an Edge bike computer, compatible smartphone, select Garmin wearables, or the radar display unit, and it offers visual and audible alerts when used with a compatible smartphone.
Who It Is Best For
This is a strong choice for cyclists who want extra awareness on the road and prefer alerts that can be shown on a bike computer, phone, wearable, or display unit. It is also useful for riders who already use compatible Garmin devices or third party riding apps and want rearward alerts in a format that suits their setup.
What To Know Before You Buy
The unit is described as a rearview radar with a built in tail light, and it provides awareness of approaching vehicles up to 140 metres away. When used with a compatible smartphone, the Varia app can show graphics and provide tone and vibration alerts, and it can also work with third party apps such as Ride with GPS.
Pros: Offers rearward vehicle awareness with several display options and smartphone alerts.
Cons: You should check device compatibility before ordering, especially if you want to use it with a bike computer, smartphone, wearable, or third party app.
Common Buyer Questions
What does the Garmin Varia RTL515 do?
It is a rearview cycling radar with a built in tail light that helps you notice vehicles approaching from behind.
How far away can it detect vehicles?
It is described as providing awareness of vehicles approaching from behind up to 140 metres away.
Can it work with a smartphone?
Yes. When used with a compatible smartphone, the Varia app provides graphics, tone alerts, and vibration alerts.
Does it work with Garmin devices?
Yes. It pairs with an Edge bike computer, select Garmin wearables, and the radar display unit.
Can it be used with other cycling apps?
It is described as integrating with third party apps such as Ride with GPS when used with a compatible smartphone.
Key Details
| Detail | What it means in use |
|---|---|
| Rearview radar with tail light | Combines rearward awareness with a light in one cycling accessory. |
| Vehicles approaching from behind up to 140 metres | Helps you notice traffic coming from the rear. |
| Compatible with Edge bike computer | Can display alerts on a compatible Garmin bike computer. |
| Compatible smartphone support | Can be used with the Varia app for graphics, tone alerts, and vibration alerts. |
| Select Garmin wearables or radar display unit | Gives more than one way to view rearward alerts. |
| Daylight visibility up to 1 mile | Provides visibility to motorists in daylight as soon as possible. |
Final Buying View
The Garmin Varia RTL515 is a practical option for riders who want a rearview cycling radar with a built in tail light and flexible alert options. If you already use compatible Garmin gear or a supported smartphone setup, it gives you a clear way to stay more aware of traffic behind you. Check compatibility before ordering, then choose the display option that suits your ride best.
Using Radar Alerts
Treat radar alerts as an extra source of awareness, not a replacement for looking and listening for traffic. Keep your attention on the road and use your usual judgement when deciding how to respond to an alert.






