Garmin
Varia RTL515 Radar With Tail Light

Safety on the road has always been a concern. As a result I often am twisting my neck to see if there are cars behind. This is especially true when I ride 2 abreast with a friend (I choose to change to single file if I know a car is behind). Yes I have tried every mirror option available (helmet, bike handlebars, etc...) none of them consistently gave me the confidence that I knew what was behind me.

But the Vario does what it says. An audible as well as visual warning, well before I can hear a car coming. It was 100% accurate-I was quite impressed. What happens when 1 car passes you? Well, the noise of the 1st car makes it impossible to be certain if there is another car or now, so you have to turn your neck, which invariably means you sway a bit (even if just a little) in your lane. The Vario addresses this too. The red warning lights stay on if there is a 2nd or 3rd car until all cars have passed-genius.

I am a Wahoo user and it paired just fine with my Elemnt Bolt, full functionality.

Why almost perfect? One of my concerns is the poor driver who may drift out of their lane and hit me (much more of a problem with Cell Phones). My preference would be to have a camera that would show me that a car was getting dangerously close so I could head to the ditch and have some control of the outcome. Radar can't do that. So it is not all I could want but it is a massive improvement.

Had I realized how well it works I would have bought it sooner. Game changer!

excellent battery life

great app for battery and warning of approaching vehicles

Garmin computer syncs seamlessly with the light, and you as a rider can get prepared for passing cars with plenty of warning, ~ 1 mile on a straight road, less on curvy roads. Love it! feel naked riding without one now!

I think this is a must have safety item unfortunately these days, with so many distracted drivers and so many large vehicles that approach us way too close for comfort.

Have been using an RTL510 for 6-8 months, now won't ride without it. Useful in ways I hadn't imagined: (a) on fast descents when it's too dangerous to look back, it tells you if traffic is coming up behind you, (b) tells you if it's safe to move left to avoid bad pavement, (c) if you need to turn left, it helps you tell if a clot of traffic is approaching from behind, (d) while it doesn't display the lateral position of a vehicle passing you, you should expect a close pass if it shows that a pass is happening close to a blind corner or crest, or oncoming traffic. Also, I was unaware that its flash rate increases when traffic is approaching from behind until one day in my car I came up behind a RTL-equipped cyclist - quite a light show!

Limitations: (a) in high-traffic areas it will alert continuously (I avoid areas like that anyway), (b) if you are cycling along a secondary road paralleling an expressway, it may pick up traffic on the highway, (c) on curvy or rolling roads, terrain may block the radar beam long enough for a contact to be temporarily lost, reappearing as it gets closer. You should double-check with a head turn when it's important, because the RTL gives a low rate of false positives (not critical) and a lower rate of false negatives (critical!) in certain specific situations. The false positives seem to be triggered by motion-detecting lights or cameras (I routinely get false alerts when passing certain facilities). Occasionally it may temporarily show multiple dots when there is only a single vehicle, or "miss" a vehicle following closely behind another. False negatives happen when an upcoming vehicle slows to wait for a safe opportunity to pass me, so that it is going at my speed, no longer approaching me. If that situation persists long enough, that vehicle may vanish from my screen, making an abrupt left turn risky. Have gotten these false negs a number of times.

All in all, the RTL is a huge plus, greatly reducing the amount of shoulder-checking I have to do, so I wobble less and scan the road ahead more closely.

It is very nice knowing that a car is approaching without having to use a mirror. The light seems to be very bright and noticeable. Because of the pandemic I have been riding alone so have not determined how it affects other riders in a paceline.

I have been using the earlier version of Varia Radar 2 for a bit over two years. I have been told by drivers, among them two FedEX drivers, that it is the most effective tail light they have ever seen. It was visible at a distance of more than a mile. It begins flashing as soon as a car comes within the radar range. I ride just about every day and I have never been surprised by a vehicle coming up behind me. My computer beeps and the display of the vehicle or vehicles approaching shows along the right side of my Edge 1030. I can judge the speed and distance of the approaching vehicle from the display. It really is a remarkable piece of equipment, and it sounds like they have made it even better. My unit will start giving me a low battery warning after about 4 hours on a ride. I have never run out of battery, but my rides don't usually last longer than 4 hours. The longer life battery is certainly not a waste. To give some idea of the sensitivity of the radar, I was once standing by the side of the road taking a break when a runner I had passed earlier approached. The computer beeped, and the display showed the runner approaching. That is pretty amazing. Yet, at the same time, when I have ridden with another rider, his presence is not noticed by the radar, only cars approaching us. The stimulus for the radar is something approaching, not something keeping pace with you. Recharge time is about an hour or less. It is, in my opinion, a necessity if you ride on the road. It will pair with most Edge computers and, also, with Wahoo computers.

A friend recommended this to me and I bought one. I love it. For a techie product, I love that it just works. Easy peasy. It is a substantial safety improvement to see cars approaching from behind. It is really the only game changer in many years. I bought an Edge 130 computer to go with it, replacing an older computer, and it is great, too. The best thing is that 1) I can work it, and 2) it requires no sensors. No wires, no batteries to keep replacing. I liked it so well I bought my daughter the same kit.

I really like this product. Before having it I was always wondering about traffic coming on behind and getting distracted with looking back. Now I know what's coming well before it passes me. I also know that the light is helping with visibility as it kicks in to high gear flashing when it detects a car approaching. Fantastic

Easy to set up and link with my Garmin 1000 and phone if needed . Such a great device now you don't have to be Surprised by a car on top of you . Now you'll know When a cars coming from behind.

I absolutely love the Varia. I've been using it for over a month now and wouldn't want to live without it. The light is super bright and the radar works well!!

The Varia RTL515 has immediately become indispensable for me. I ride mostly country roads and have never been able to get used to a helmet mirror, so the Varia is great. It picks up vehicles at the same time as my riding partners with mirrors. The battery life is fantastic - no problem for 100+ mile rides. Garmin undersells what I think is a great feature - the reactive-blink tail light. I think drivers intuit that increasing blinking to mean you know they're there, and they are less apt to brush you with their side view mirror. The only feature/flaw that I see as a negative is that any vehicle that appears on the radar then matches your speed disappears! Once you realize that, you can adjust your perceptions accordingly, but this characteristic of the radar could be in all caps in the manual. Overall, not inexpensive but worth every penny.

This product to me is a game changer. I bought this because with the pandemic I was mainly riding alone and felt more vulnerable to cars than in a group of 20 riders. This tells you without looking that a car is coming from about 1 1/2 football fields away (I think actually 143 meters). You can see it approaching you and how fast. I know if I happen to be riding side by side to mover over or if by myself to move as far right as I can. Even if there are things in the road like a hole or debris I know if I can just go right around it or if I need to slow down because there is a car. The brightness of the flashing rear light increases as does the frequency when it detects a car. There is also an audible tone if you want and colors of the approaching car to indicate how fast it is approaching. I see people riding with mirrors but this if far superior. I think at $199 it is the deal of the century. Seems more than worth it to avoid getting hit by a car. Battery life is great. Syncs perfectly every time to my Garmin. Easily can be transferred from bike to bike. Takes about 30 seconds.

I feel so much safer with this light. I paired it with my new Garmin 1030 & I can control it from the computer! No more twisting around in my seat, or having to get off my bike to change the settings.

It only takes one ride to realize how valuable this is. It works extremely well. It does not get fooled and give false alarms very often. However, if you are riding on a trail that parallels a street, it will rightfully pick up that traffic. If you make a 90 degree turn, the cars passing on the street you just turned off of, will briefly trigger the radar. When you do get an alarm (a very distinct beep) there is plenty of time to react and being able to track its progress is fantastic. If there are multiple cars approaching you will see multiple dots on the screen. It does very well on twisty roads as well. It detects cars approaching around corners sometimes before you can see them. My only word of caution is to always charge it up before every ride. Not that it doesn't have a good battery but It takes a lot of power to do all this and a real bummer if it runs out during a ride.

Out of all the money I have spent as a cyclist this is the greatest investment I've made I feel so safe riding my bike let me know a block and a half away that a car is behind me! And the number of cars to how great is that!

Total game changer. I know now when I need to look over my shoulder when a Tesla sneaks up on me. Love it!

I use the rear tail light (rtl) radar every time ride on roads. It has really given me the confidence to ride on roads with cars approaching me from behind. I feel like it's a third eye (rear-facing).

I thought it would be gimmicky but it's my new must have item for any ride! While I still shoulder check for oncoming cars when moving into traffic it's great for taking the lane. I can just ride until it beeps to let me know a car is approaching. And it works great with my Garmin 830.

Paired with my edge 530, this thing is a great addition to my road cycling. I feel much less exposed knowing when cars are coming without craning my head around to look, the face that the light gets brighter when a car is coming is also great. The only downside is somewhat limited battery life and the fact that it identifies people who are cycling behind you fairly often.

Im 75 with bad hearing and cant wear my hearing aids because of the wind noise. I ride in Spearfish Canyon and there is a lot of traffic at times and loging trucks. It works great and if the are several vehicles behind me it will show each one on the led lights.

My son bought it for me on Fathers Day several year ago and I been using it ever since

I highly recommend it.

The ability to detect multiple vehicles and a general idea of how quickly they are approaching you is great. I still check my mirror to confirm, but I hear the beep well before the vehicle. My only wish is that my garmin would sound a little louder, particularly with a headwind (which has nothing directly to do with this unit).