Garmin Varia RearVue 820, Radar Tail Light w/ Advanced Features (010-03180-00)
Garmin Varia RearVue 820, Radar Tail Light w/ Advanced Features (010-03180-00)
Model Number: 010-03180-00
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Tech Specs
Garmin Varia RearVue 820 Radar Tail Light with Advanced Vehicle Detection
Introduction
The Garmin Varia RearVue 820 is a rear-mounted safety system that combines a high-output tail light with integrated radar to give cyclists real-time alerts about approaching vehicles and traffic changes. Instead of riding blind to rear threats, you get dual-layer awareness: a bright, responsive light for visibility and a precision radar sensor that detects vehicles up to 175 meters behind you and alerts you before they're close. This system transmits data directly to compatible Edge computers, Garmin smartwatches, or your smartphone via the Varia app, giving you actionable warnings that let you adjust your line, signal your intent, or prepare for incoming traffic.
Key Features
- Radar detection range of up to 175 meters with a 220-degree field of view to monitor vehicles approaching from adjacent lanes and far behind
- Tail light visibility reaching up to 2 kilometers (1.24 miles) for conspicuity in daylight and traffic-heavy environments
- Maximum light output of 100 lumens in Day Flash mode, with Night Flash, Solid, and Peloton modes for varying riding conditions
- Battery endurance up to 24 hours in Day Flash mode and 30 hours in radar-only operation for all-day commutes and extended rides
- Brake light functionality that automatically signals deceleration when you slow or stop, improving awareness for drivers behind you
- IPX7 water resistance rating for dependable performance during rain, splashes, and wet road conditions
- Compact dimensions of 98.9 × 25.9 × 43.2 mm and weight of approximately 90 grams, designed to mount securely on road and gravel bike seat posts
- ANT+ and Bluetooth Low Energy (BLE) connectivity for seamless multi-device compatibility with Edge computers, Garmin watches, and the Varia app
Data Insights
Real-world testing shows that the combination of 175-meter radar reach and 100-lumen rear illumination significantly reduces surprise encounters with rear traffic. The system's ability to identify vehicle approach speed and trajectory allows riders to make proactive positioning decisions rather than reactive ones. With radar-only mode extending battery life to 30 hours, commuters on longer routes gain extended coverage without frequent charging. The integrated brake-light detection adds an extra layer of communication to drivers, helping convey your deceleration intentions and reducing rear-end incidents on urban and rural corridors.
Usage Instructions
Mount the RearVue 820 on your seat post using a compatible Garmin mounting bracket, then pair the device with your Edge computer, Garmin smartwatch, or the Varia app via Bluetooth or ANT+. Select your preferred light mode for daytime or night riding, and enable radar alerts to receive vehicle notifications on your display or wrist. Keep the firmware current through the app, and ensure the radar sensor faces directly behind your bike to maximize coverage and detection accuracy during urban commutes or open-road riding.
Design & Material
The RearVue 820 integrates a bright rear beacon with a compact radar module into a weather-sealed, aerodynamic shell designed to mount unobtrusively on any seat post. The rubberized black body houses both the high-intensity red LED light facing rearward and a forward-facing radar sensor, creating a unified safety system that requires only one mount point while delivering dual protection.
- Black rubberized composite housing with red translucent lens for light diffusion and visibility
- Radar sensor engineered for 220-degree coverage to detect vehicles approaching from behind and alongside
- USB-C charging connector for fast, universal charging compatibility across devices
- IPX7 water-resistance rating enabling performance in rain, road spray, and humid conditions
- Lightweight at 90 grams with a low-profile shape that doesn't interfere with seat bag mounting or aerodynamics
- Garmin ecosystem integration via ANT+ and Bluetooth for direct compatibility with Edge 130 Plus, Edge 530, Edge 840, and Garmin Forerunner and Epix watch models
Final Verdict
The Garmin Varia RearVue 820 delivers the rear-aware riding confidence that solo cyclists and commuters need. By merging a powerful tail light with extended-range radar and seamless Garmin device integration, it eliminates blind spots and gives you time to react to traffic changes. Its 30-hour battery life, durable weather sealing, and intuitive app customization make it a complete safety solution for road, gravel, and urban cycling. If you ride where rear traffic is a concern, invest in RearVue 820 and gain the situational awareness that transforms how safely and confidently you ride.
In The Box
Manual & Warranty
Do you have an old GPS unit lying around? The GPS Nation Trade In and Up program is a great way to trade in your old and used GPS for credit towards a new GPS. The choice is entirely yours! We’ve made the process simple and streamlined. Follow these simple steps, and you will be on your way to receiving credit towards your brand new GPS!
1. Get a quote
To get your free quote, provide your GPS type, manufacturer, model, and condition. Within 24 hours, you will receive a quote for the trade-in value of your current product. The GPS trade-in/trade-up form is at the bottom of this page.
2. Ship your product(s) for trade
After accepting our offer, pack your product(s) safely and ship them to us using the pre-paid shipping label provided to you. We will provide a confirmation email when your trade-in arrives at our warehouse. You have 30 days from the date you complete your on-line trade to ship the product to GPS Nation.
3. Make your purchase
Once we receive your product at our warehouse and we validate the stated condition, we will send you a confirmation email. If you elect to receive credit towards a new GPS at gpsnation.com, your store credit will be issued, and you are free to make your purchase.
Reviews
Ask a Question
Tech Specs
Garmin Varia RearVue 820 Radar Tail Light with Advanced Vehicle Detection
Introduction
The Garmin Varia RearVue 820 is a rear-mounted safety system that combines a high-output tail light with integrated radar to give cyclists real-time alerts about approaching vehicles and traffic changes. Instead of riding blind to rear threats, you get dual-layer awareness: a bright, responsive light for visibility and a precision radar sensor that detects vehicles up to 175 meters behind you and alerts you before they're close. This system transmits data directly to compatible Edge computers, Garmin smartwatches, or your smartphone via the Varia app, giving you actionable warnings that let you adjust your line, signal your intent, or prepare for incoming traffic.
Key Features
- Radar detection range of up to 175 meters with a 220-degree field of view to monitor vehicles approaching from adjacent lanes and far behind
- Tail light visibility reaching up to 2 kilometers (1.24 miles) for conspicuity in daylight and traffic-heavy environments
- Maximum light output of 100 lumens in Day Flash mode, with Night Flash, Solid, and Peloton modes for varying riding conditions
- Battery endurance up to 24 hours in Day Flash mode and 30 hours in radar-only operation for all-day commutes and extended rides
- Brake light functionality that automatically signals deceleration when you slow or stop, improving awareness for drivers behind you
- IPX7 water resistance rating for dependable performance during rain, splashes, and wet road conditions
- Compact dimensions of 98.9 × 25.9 × 43.2 mm and weight of approximately 90 grams, designed to mount securely on road and gravel bike seat posts
- ANT+ and Bluetooth Low Energy (BLE) connectivity for seamless multi-device compatibility with Edge computers, Garmin watches, and the Varia app
Data Insights
Real-world testing shows that the combination of 175-meter radar reach and 100-lumen rear illumination significantly reduces surprise encounters with rear traffic. The system's ability to identify vehicle approach speed and trajectory allows riders to make proactive positioning decisions rather than reactive ones. With radar-only mode extending battery life to 30 hours, commuters on longer routes gain extended coverage without frequent charging. The integrated brake-light detection adds an extra layer of communication to drivers, helping convey your deceleration intentions and reducing rear-end incidents on urban and rural corridors.
Usage Instructions
Mount the RearVue 820 on your seat post using a compatible Garmin mounting bracket, then pair the device with your Edge computer, Garmin smartwatch, or the Varia app via Bluetooth or ANT+. Select your preferred light mode for daytime or night riding, and enable radar alerts to receive vehicle notifications on your display or wrist. Keep the firmware current through the app, and ensure the radar sensor faces directly behind your bike to maximize coverage and detection accuracy during urban commutes or open-road riding.
Design & Material
The RearVue 820 integrates a bright rear beacon with a compact radar module into a weather-sealed, aerodynamic shell designed to mount unobtrusively on any seat post. The rubberized black body houses both the high-intensity red LED light facing rearward and a forward-facing radar sensor, creating a unified safety system that requires only one mount point while delivering dual protection.
- Black rubberized composite housing with red translucent lens for light diffusion and visibility
- Radar sensor engineered for 220-degree coverage to detect vehicles approaching from behind and alongside
- USB-C charging connector for fast, universal charging compatibility across devices
- IPX7 water-resistance rating enabling performance in rain, road spray, and humid conditions
- Lightweight at 90 grams with a low-profile shape that doesn't interfere with seat bag mounting or aerodynamics
- Garmin ecosystem integration via ANT+ and Bluetooth for direct compatibility with Edge 130 Plus, Edge 530, Edge 840, and Garmin Forerunner and Epix watch models
Final Verdict
The Garmin Varia RearVue 820 delivers the rear-aware riding confidence that solo cyclists and commuters need. By merging a powerful tail light with extended-range radar and seamless Garmin device integration, it eliminates blind spots and gives you time to react to traffic changes. Its 30-hour battery life, durable weather sealing, and intuitive app customization make it a complete safety solution for road, gravel, and urban cycling. If you ride where rear traffic is a concern, invest in RearVue 820 and gain the situational awareness that transforms how safely and confidently you ride.
In The Box
Manual & Warranty
Trade-In
Do you have an old GPS unit lying around? The GPS Nation Trade In and Up program is a great way to trade in your old and used GPS for credit towards a new GPS. The choice is entirely yours! We’ve made the process simple and streamlined. Follow these simple steps, and you will be on your way to receiving credit towards your brand new GPS!
1. Get a quote
To get your free quote, provide your GPS type, manufacturer, model, and condition. Within 24 hours, you will receive a quote for the trade-in value of your current product. The GPS trade-in/trade-up form is at the bottom of this page.
2. Ship your product(s) for trade
After accepting our offer, pack your product(s) safely and ship them to us using the pre-paid shipping label provided to you. We will provide a confirmation email when your trade-in arrives at our warehouse. You have 30 days from the date you complete your on-line trade to ship the product to GPS Nation.
3. Make your purchase
Once we receive your product at our warehouse and we validate the stated condition, we will send you a confirmation email. If you elect to receive credit towards a new GPS at gpsnation.com, your store credit will be issued, and you are free to make your purchase.
Overview
Garmin Varia RearVue 820 Radar Tail Light with Advanced Vehicle Detection
Introduction
The Garmin Varia RearVue 820 is a rear-mounted safety system that combines a high-output tail light with integrated radar to give cyclists real-time alerts about approaching vehicles and traffic changes. Instead of riding blind to rear threats, you get dual-layer awareness: a bright, responsive light for visibility and a precision radar sensor that detects vehicles up to 175 meters behind you and alerts you before they're close. This system transmits data directly to compatible Edge computers, Garmin smartwatches, or your smartphone via the Varia app, giving you actionable warnings that let you adjust your line, signal your intent, or prepare for incoming traffic.
Key Features
- Radar detection range of up to 175 meters with a 220-degree field of view to monitor vehicles approaching from adjacent lanes and far behind
- Tail light visibility reaching up to 2 kilometers (1.24 miles) for conspicuity in daylight and traffic-heavy environments
- Maximum light output of 100 lumens in Day Flash mode, with Night Flash, Solid, and Peloton modes for varying riding conditions
- Battery endurance up to 24 hours in Day Flash mode and 30 hours in radar-only operation for all-day commutes and extended rides
- Brake light functionality that automatically signals deceleration when you slow or stop, improving awareness for drivers behind you
- IPX7 water resistance rating for dependable performance during rain, splashes, and wet road conditions
- Compact dimensions of 98.9 × 25.9 × 43.2 mm and weight of approximately 90 grams, designed to mount securely on road and gravel bike seat posts
- ANT+ and Bluetooth Low Energy (BLE) connectivity for seamless multi-device compatibility with Edge computers, Garmin watches, and the Varia app
Data Insights
Real-world testing shows that the combination of 175-meter radar reach and 100-lumen rear illumination significantly reduces surprise encounters with rear traffic. The system's ability to identify vehicle approach speed and trajectory allows riders to make proactive positioning decisions rather than reactive ones. With radar-only mode extending battery life to 30 hours, commuters on longer routes gain extended coverage without frequent charging. The integrated brake-light detection adds an extra layer of communication to drivers, helping convey your deceleration intentions and reducing rear-end incidents on urban and rural corridors.
Usage Instructions
Mount the RearVue 820 on your seat post using a compatible Garmin mounting bracket, then pair the device with your Edge computer, Garmin smartwatch, or the Varia app via Bluetooth or ANT+. Select your preferred light mode for daytime or night riding, and enable radar alerts to receive vehicle notifications on your display or wrist. Keep the firmware current through the app, and ensure the radar sensor faces directly behind your bike to maximize coverage and detection accuracy during urban commutes or open-road riding.
Design & Material
The RearVue 820 integrates a bright rear beacon with a compact radar module into a weather-sealed, aerodynamic shell designed to mount unobtrusively on any seat post. The rubberized black body houses both the high-intensity red LED light facing rearward and a forward-facing radar sensor, creating a unified safety system that requires only one mount point while delivering dual protection.
- Black rubberized composite housing with red translucent lens for light diffusion and visibility
- Radar sensor engineered for 220-degree coverage to detect vehicles approaching from behind and alongside
- USB-C charging connector for fast, universal charging compatibility across devices
- IPX7 water-resistance rating enabling performance in rain, road spray, and humid conditions
- Lightweight at 90 grams with a low-profile shape that doesn't interfere with seat bag mounting or aerodynamics
- Garmin ecosystem integration via ANT+ and Bluetooth for direct compatibility with Edge 130 Plus, Edge 530, Edge 840, and Garmin Forerunner and Epix watch models
Final Verdict
The Garmin Varia RearVue 820 delivers the rear-aware riding confidence that solo cyclists and commuters need. By merging a powerful tail light with extended-range radar and seamless Garmin device integration, it eliminates blind spots and gives you time to react to traffic changes. Its 30-hour battery life, durable weather sealing, and intuitive app customization make it a complete safety solution for road, gravel, and urban cycling. If you ride where rear traffic is a concern, invest in RearVue 820 and gain the situational awareness that transforms how safely and confidently you ride.
