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Garmin Varia RTL515 Radar With Tail Light

GarminVaria RTL515 Radar With Tail Light(Return to Product Page)

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User submitted reviews

Review by Anonymous

So glad I bought it item
by Anonymous
Cycling Enthusiast
Albany NY

Today was my second ride using the Garmin Varia. I really like it because it warms you about cars that are behind you from a very long distance. All that information is shown on your Garmin head unit. The view on the screen contracts and there is a dot that shows the car as it approaches you. I feel much safer knowing what is going on behind me and this device works very well. I did get a sensor error message once for a short time. But it resumed working as it should shorty after. I'm glad I bought it.

Reviewed 4/9/2023
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Review by Anonymous

Don't go on a ride without it.
by Anonymous

I've always used a rear view mirror attached to my glasses and thought there was no need for a Varia Radar sensor. Boy was I wrong'! Immediately on my first ride with it I was amazed as to how terrific it was. Now I rely on it every time I ride. Especially if I ride solo.

Reviewed 1/3/2025
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Review by golfwheels

Great product!
by golfwheels
Daily Commuter
Chicago, IL
1 of 1 customers found this review helpful.

A lot of bike tech these days seems like overkill but that's not the case with this. It has made my commute safer and I wouldn't feel as comfortable riding without it. I use the Garmin 530 and the ap on my phone. I keep one earbud in while riding to get the sound alerts. I love the color sequence that it goes through: orange means a slower vehicle, red means a faster vehicle and green means all clear. After using since last May to commute, I can honestly say I have yet to see a false positive or negative. The only issue I had was my old pannier system blocked the sensor. so I had to swap that out. Otherwise, this thing works flawlessly and makes my daily commute safer. I hated the small mirror I used to use on my bar end which was way to distracting.

Reviewed 1/11/2023
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Review by Matt Edler

Safety that's worth the price tag!
by Matt Edler
Portland
1 of 1 customers found this review helpful.

The Garmin Varia is a great device for informing you of any traffic (car or otherwise) overtaking you from behind. This device alarms (if you want) and has a visual proximity indicator, giving you ample time to shelter as close as possible to the side of the road.

I found the device to be most helpful not on busy roads while commuting, but on longer rides at those moments when riding two-abreast, it's a great reminder to fall into single file, as it alarms or notifies you with plenty of time to make this adjustment.

Hard to ride without it at this point!

Reviewed 10/27/2022
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Review by Anonymous

Great product , must have in urban and city rides
by Anonymous

If you're looking for more safety and want to know what's coming behind you this is the product you should have attached to your bike. It definitely sees everything that's coming towards you and gives a warning you do need a garmin computer for it to work properly.

Reviewed 9/12/2022
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Review by Mike

Brilliant
by Mike
NJ Central Jersey coastal area

No need to turn your head around for cars anymore. Visual on Garmin & audiable. But, it must be fully charged for each ride. Mine is paired w/ Edge 820.

Reviewed 6/26/2025
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Review by Anonymous

Must have riding on the road
by Anonymous

This radar simply works. using it for months now and only 1 time it missed a car that followed another one. It gave me the confidence to know vehicle is coming up behind me and not get scared by someone suddenly fly by next to me. the light is also nice and bright.

Reviewed 10/9/2024
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Review by MSPBiker

Worthwhile safety feature
by MSPBiker
Daily Commuter
Saint Paul, MN

You'll need a bike computer or Garmin watch, but assuming you have one (or both), this is a very worthwhile piece of safety equipment. It's quite reliable and easily understood. It pairs with your computer like any other sensor. I used to rely on listening for cars and looking over my shoulder before moving out into a lane. I still do both, but there are many times when I hear nothing and the Vario beeps to let me know someone is there.

Reviewed 8/5/2022
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Review by Alex

Works great, wish the mounting system was better
by Alex
Boston, MA

I've had one of these for over a year and put it through some cold temps. Battery life has been great so far, as advertised even down into the upper 30's. The system itself can track multiple cars and has a nice beep warning when they are coming up on you. In an urban area, this can be pretty often, but it keeps you from veering into a car you wouldn't have seen otherwise.

It only comes with a mount to attach to a seat post, so cannot mount to a bag without some modifications. I poked a couple holes into my bag to get the screws in an it works great. Only other downside is no strap like the GPS's have to catch the unit if it falls off, so far it has not fallen off.

Reviewed 8/5/2022
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Review by Peggo

Won't road ride without it!
by Peggo
Cycling Enthusiast
Front Range Colorado
2 of 2 customers found this review helpful.

This is a great device for making me aware of vehicles behind me. I used the Varia app on my smartphone and strapped the phone to the bar. I was constantly amazed by how far away the radar sensed vehicles behind me. Both the graphic and audible alert on the phone are great! However, I do not like the large phone on the bars so have purchased a Garmin Edge 830 to use instead and hope the alerts on the Edge will help as much as the phone app did ! I was more relaxed riding having this one more tool in the box (besides listening, looking behind me and using a mirror). The radar picked up vehicles often before I could see any detail in my mirror or hear it so it helped me stay alert and avoided those last minute surprises that can happen when a fast vehicle suddenly shoots around you.

Reviewed 7/20/2022
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Review by Anonymous

I've come to rely on the extra set of eyes this radar light provides.
by Anonymous
Cycling Enthusiast
Portland, Oregon

Great piece of tech. This is my second one. The first one stopped recharging after several years. I bought the same one again.

Reviewed 6/9/2025
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Review by ESaburi

Game Changer for Roadies
by ESaburi
Seattle, WA

I had seen others use it and grew accustomed to hearing the audible alert in a group ride. I found myself missing it when I rode solo so I purchased one. It's a little big, not aero and the mounting system is goofy. Despite that, I give it five stars for the safety it provides. I don't ride without it.

Reviewed 9/5/2024
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Review by Pina Rider

Great Addition To My Bike
by Pina Rider
central Kentucky

There are some roads that I ride that require me to constantly turn and look for cars approaching from behind. With this new radar those days are over. I now know when a car is approaching so I can get over on the shoulder. Love it.

Reviewed 9/5/2024
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Review by Anonymous

I'm amazed at how helpful it is to have early warning of vehicles approaching from behind.
by Anonymous
Vancoiver WA

I resisted purchasing this rear radar light because I thought it wasn't 'really' needed. On my first ride with it I realized it provides early warning of approaching vehicles that I was not aware of even though I used a glasses mirror and checked it frequently. I should have purchased this years ago.

Reviewed 9/6/2024
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Review by USA1169

Essential kit in rural areas, I now feel naked without it!
by USA1169
Cycling Enthusiast
Hood River, Oregon
1 of 1 customers found this review helpful.

Four years ago I got the RTL510 version of this (no bluetooth) and paired it with a Wahoo Bolt. That combo has been the single best bit of kit that I have added in ten years. If you ride in urban areas I would probably skip it as the radar will go off constantly, but in suburban and rural areas it is absolutely worth every penny. My first unit worked perfectly, the only reason I upgraded tp the RTL 515 is that after about fifteen thousand miles the battery life degraded from just over four hours to just over three (with the light on solid... if you use the flasher it has much longer life). Just finishing a month in France riding almost every day and the newer RTL 515 has been every bit as solid, with battery life exceeding 4.5 hours on solid. The few times I have gone out without it I feel naked. This from a guy that never used a tail light because it seemed like just one more think to complicate my life.

Reviewed 5/24/2022
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Review by HerbP

Wouldn't ride without it!
by HerbP
montclair, NJ
1 of 1 customers found this review helpful.

Another on-line review said there are two kinds of people: those who don't have a Varia and don't see the need for one and those who have one and wouldn't ride without it. I moved from the first group to the second.

Easy interface with Wahoo computer. I turned off the audible alerts: TMI and annoying. But glancing down from time to time I see what's coming well before I hear it. I've tried to catch it making errors but so far have not been able to. Even tells you how many cars are coming. The LED alerts are usually washed out in daylight so are not that helpful.

Reviewed 4/28/2022
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Review by John

An important part of road cycling
by John
Cycling Enthusiast
Naples, FL

This is my second Varia. My first one's battery wore out after so much usage over the past 6 years. I used this in Vietnam to warn me of the cars and motorcycles that swirled around me. It was a big help. I now use it here in the USA. Too many of my friends have been injured in accidents caused by cars, so I am so happy to have this as a part of my daily cycling.

Reviewed 8/23/2024
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Review by Dave O

Amazing piece of safety gear
by Dave O
Cycling Enthusiast
Anacortes, WA
2 of 2 customers found this review helpful.

I have my Varia RTL515 mounted on the back of my seat bag so the radar unit is positioned high for maximum distance and no interference from the rear tire. Although I like using it on small group rides it seems to be most beneficial on solo rides, keeping me aware of all rear approaching vehicles in plenty of time. The unit works as advertised and is living up to my expectations although I would have liked longer battery life. Isn't that always the case.

Reviewed 4/11/2022
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Review by GR

An extra measure for safety while riding.
by GR
Cycling Enthusiast
Crescent City, CA

This device makes a wonderful addition to my cycling experience. I get notified as traffic approaches and how many vehicles there are within 253 feet behind me. I can see the speed of their approach and I am notified when all is clear. Also, the light flashes more intensely and quickly while traffic is approaching and so it provides better information to the drivers behind me about my presence. The only downside experience I had was a with the Garmin 830 controlling the light, type of flash and turning it off. Now, I could intervene on the head unit and reselect the flash type I wanted, but turning the Varia off that became a problem, surprisingly. It turns off the light when the Varia is switched off but leaves the Varia's Bluetooth on which runs down the battery. I did find the command in the settings to turn this feature off which works better for me.

Reviewed 4/4/2022
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Review by Anonymous

Works quite well, consider seat-post height
by Anonymous
Cycling Enthusiast
Seattle

I am not a tall rider so there is no seat-post real estate below my saddle bag so I had to order a new saddle bag with a Garmin mount. It works pretty well but the angle is down more than I'd like.

The light is very bright, I put it on flash mode to save battery. I disabled the audio from the radar as it is quite annoying in heavily trafficked roads.

Reviewed 8/16/2024
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