See and Be Seen, Day or Night
- Provides visual and audible alerts to warn of vehicles approaching from behind up to 153 yards (140 meters) away
- Tail light offers daylight visibility up to a mile away and is visible within a 220-degree range, so drivers can see you well before the radar sees the vehicle
- Sleek vertical design easily mounts to most road-use bicycles, including racing, touring and commuter styles
- Requires a dedicated radar display unit or wirelessly integrates with compatible Garmin devices (sold separately)
- Battery life: up to 15 hours in flashing mode or 6 hours in solid or night flash mode
Ride smarter and more aware with Varia RTL510 rearview radar. Mounted neatly on the seatpost, it provides visible and audible alerts for vehicles approaching from behind up to 153 yards (140 meters) away. Plus, the bright tail light is visible in daylight from up to a mile away, so you can ride with confidence and peace of mind.
This Sensor Has Your Back
When out on a ride, you have to keep track of everything. What’s your route, how far are you going, how fast and how hard are you going to push it. But with Varia radar along for the ride, it’s like having eyes in the back of your helmet. It’s essentially an early warning system so you see cars approaching from behind, and they see you.

Safety in Numbers
Varia RTL510 rearview radar is just one part of cycling awareness. When paired with compatible Garmin devices, the system helps to create safer riding environment by alerting riders to vehicles approaching from behind. Green light? All good. Amber light? A vehicle is approaching. Red light? Take caution — a vehicle is approaching at high speeds. Ride safe.

See and Be Seen, Day or Night
Provides visual and audible alerts to warn of vehicles approaching from behind up to 153 yards (140 meters) away
Tail light offers daylight visibility up to a mile away and is visible within a 220-degree range, so drivers can see you well before the radar sees the vehicle
Sleek vertical design easily mounts to most road-use bicycles, including racing, touring and commuter styles
Requires a dedicated radar display unit or wirelessly integrates with compatible Garmin devices (sold separately)
Battery life: up to 15 hours in flashing mode or 6 hours in solid or night flash mode
D2™ Delta
D2™ Delta PX
D2™ Delta S
Edge® 1000
Edge® 1030
Edge® 130
Edge® 130
Edge® 25
Edge® 510
Edge® 520
Edge® 520 Plus
Edge® 520 Plus
Edge® 530
Edge® 530 Mountain Bike Bundle
Edge® 810
Edge® 820
Edge® 830
Edge® 830 Mountain Bike Bundle
Edge® Explore 1000
Edge® Explore 820
fēnix® 5
fēnix® 5 Plus
fēnix® 5S
fēnix® 5X
fēnix® 5X Plus
fēnix® Chronos
Forerunner® 735XT
Forerunner® 935
Forerunner® 945
tactix® Charlie
Varia Vision™ In-sight Display
vívoactive® 3
vívoactive® 3 Music
vívoactive® HR