{"id":500224,"date":"2026-02-24T04:28:11","date_gmt":"2026-02-24T04:28:11","guid":{"rendered":"https:\/\/www.newsbeep.com\/au\/500224\/"},"modified":"2026-02-24T04:28:11","modified_gmt":"2026-02-24T04:28:11","slug":"cheap-cycling-radar-lights-tested-vs-garmin-varia-rtl515","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/au\/500224\/","title":{"rendered":"Cheap Cycling Radar Lights Tested vs Garmin Varia RTL515"},"content":{"rendered":"

\"Estimated5 min read<\/p>\n

Cycling radar is an extremely popular accessory for road and gravel bikes. Over the last few years, many riders have started using on-bike radar<\/a> systems to notify them of vehicles approaching from behind. Cycling brands like Garmin<\/a>, Wahoo<\/a>, Trek<\/a>, and Lezyne<\/a> sell radars that have performed well in our testing.<\/p>\n

While many riders opt for a Garmin Varia RLT515, the radar we consider the segment\u2019s benchmark, others ask, \u201cWhat\u2019s the cheapest one I can get?\u201d It\u2019s a question I often field from readers and friends looking to purchase a radar device. Radar units aren\u2019t super expensive in general (the priciest one<\/a> is $400), but you can now find many budget-priced options on Amazon<\/a> and AliExpress<\/a> for as little as $20.<\/p>\n

\"Varia<\/a>Pros\"Pro\"Highly reliable and consisent.Cons\"Con\"USB-A charging.<\/p>\n

And I get it; unless you\u2019re a top professional, cycling gear isn\u2019t free. Many riders aren\u2019t ready to spend good money on something they\u2019re unsure if they\u2019ll actually like. So, it can be tempting to buy a low-cost radar to try before splurging on a name-brand unit. But should you leave your safety up to a cheap radar?<\/p>\n

Over the past year, Bicycling\u2019s editors and test team have tried a dozen radar systems across the full range of prices. We urge caution when shopping for a cycling radar solely on price. While two low-cost radars performed well, four did not meet our expectations in ride testing on our local roads.<\/p>\n

Radar Lights<\/p>\n

It\u2019s important to know the types of radar lights when shopping for a cheap radar. Read the product information carefully to ensure you\u2019re buying what you expect.<\/p>\n

When most cyclists and brands use the term \u201cradar light,\u201d it typically refers to taillights with integrated radar that provide the rider with an audible or visual warning to alert them of a vehicle approaching from behind. These are the types of radar lights our editors test and use.<\/p>\n

However, some cheap radar lights only use radar to brighten the taillight when a vehicle is detected. These lights do not provide the rider with any warning or notification about an approaching vehicle. Be aware of these lights when shopping.<\/p>\n

A good way to tell if a radar light will alert you about approaching vehicles is to check the product specifications. Brands will usually note Bluetooth or ANT+ compatibility (and a list of compatible head units) along with photos of warnings on a cycling computer<\/a> or mobile app.<\/p>\n

\"Devicetrevor raab<\/p>\n

The Magene L508 is a radar we like for less than $100.<\/p>\n

What Makes a Radar Good?<\/p>\n

One trait defines the radars we like from the ones we avoid: Trust.<\/p>\n

Since you\u2019re putting your life in the hands of a radar when you\u2019re riding, it must reliably and dependably do its job. The best radar systems consistently provide ample warning of vehicles and seamlessly blend into your ride because you trust them so much. But even good radars should consistently provide you with warnings of approaching vehicles and give you sufficient time to react.<\/p>\n

As the manufacturers admit, no radar system is perfect. False positives\u2014the radar detects something and alerts the rider, but no vehicle is present\u2014occur with every unit. Sometimes called \u201cghost cars,\u201d false positives can be triggered by various things in the riding environment. Reflections in windows, trees, dogs, and chainlink fences are some common culprits. While a little annoying, a ghost car doesn\u2019t result in disaster for the rider.<\/p>\n

False negatives, by contrast, can result in serious injury or death for cyclists. This happens when the radar unit fails to detect a vehicle approaching you from behind, or the radar doesn\u2019t notify you at all. Good radar units seldom, if ever, produce an outright false-negative.<\/p>\n

Radars that make you look over your shoulder constantly due to repeated false positives erode your trust in them. Even worse are systems that consistently notify you too late of vehicles or regularly miss vehicles entirely.<\/p>\n

When this happens consistently, you stop paying attention to it or shut the device off. At this point, the radar unit effectively becomes nothing more than a heavy blinky light with shorter battery life. By definition, these are not good cycling radars.<\/p>\n

An example of a good radar is Garmin\u2019s RTL515. This is our benchmark radar taillight for both performance and price. It tracks vehicles well, has good range, and rarely gives us ghost cars. The device has been around for years, yet it still outperforms most competitors.<\/p>\n

Radars to Avoid<\/p>\n

Of the dozen radars we tested over the last year, the median price is $154.99. So, let\u2019s consider any units costing less than $150 as \u201clow cost\u201d options\u2014We tested six of them. There are a couple of good radars available in this price range, and there are some stinkers.<\/p>\n

The four we cannot currently recommend are iGPSport ($79.90), Cycplus ($89.00), Ravemen ($99.95), and MagicShine ($129.99). Each device proved unreliable in ride testing. All of these units suffered from so many false positives that we could not trust them on rides.<\/p>\n

These false positives distracted us from riding, and we found ourselves constantly looking over our shoulders to see whether the alerts we received were valid threats or ghost cars. Additionally, these units did not reliably track targets, either notifying us too late to move over or giving us an all-clear when a vehicle was still present.<\/p>\n

I found MagicShine\u2019s SeeMee R300 particularly egregious. It notified me of ghost cars with such persistance that I remarked in my notes after the first test ride, \u201cThis thing isn\u2019t a radar light, it\u2019s a gaslight.\u201d On my second try with the unit, it produced even more false positives; I shut it off to maintain my sanity.<\/p>\n

\"Brytontrevor raab<\/p>\n

Bryton\u2019s Gardia R300L is another low-cost unit we like.<\/p>\n

Good Low-Cost Radars <\/p>\n

While four radars did not meet our expectations in testing, two low-priced options\u2014Magene and Bryton\u2014held their own against some of the big brands.<\/p>\n

The Magene L508 ($99.99) and Bryton Gardia R300L ($129.95) radars tracked vehicles, provided sufficient warning, and had decent battery life. Plus, they both have USB-C charging and an integrated brake light\u2014features which Garmin only recently introduced on its premium-priced Varia RearVue 820<\/a> radar.<\/p>\n

The Bryton and Magene devices are examples of lower-cost options that work well. While we experienced some ghost cars on rides with both radar units, the false positives weren\u2019t excessive.<\/p>\n

I lent the Bryton Gardia to a friend for a 25-mile ride last weekend, and I used the Garmin RearVue. Riding side-by-side, the RearVue detected cars from a further distance. However, the Gardia still gave us ample warning of approaching vehicles and rarely experienced ghost cars.<\/p>\n

The Magene performed similarly to the Bryton in my ride testing. It gave me some false positives, but they were not excessive. The L508 also has a nice form factor and programmable flash settings.<\/p>\n

Bottom line: Whether you\u2019re buying the ones we tested or another option, do your homework before purchasing a cheap radar. Dig into the details, read\/watch third-party reviews (such as Shane Miller\/GPLama<\/a>), and talk to actual users to learn about their real-world experiences. And when the highly reliable Garmin Varia RTL515 is available for $150, is it worth the headaches and safety to save only (at most) 70 bucks?<\/p>\n

Benchmark Cycling Radar<\/p>\n

\"Varia<\/a>Garmin Varia RTL515<\/p>\n

Now 25% Off<\/p>\n

A Solid Radar Option<\/p>\n

\"Gardia<\/a><\/p>\n

Our Lowest-Priced Pick<\/p>\n

\"L508\"<\/a>Can the Others Improve?<\/p>\n

As Magene and Bryton show, lower-priced radars can perform reasonably well and be trusted by users. However, both brands went through teething pains and firmware updates until their devices reached this level. Unfortunately, some early users of these systems essentially field-tested the radars.<\/p>\n

But that means there\u2019s hope that MagicShine, Racemen, Cycplus, and iGPSport\u2019s units can be improved. Perhaps these brands can modify their firmware and push updates to decrease the false positives and make their devices more reliable. Currently, these systems are not up to snuff, and there are many reliable options available for not that much more money.<\/p>\n

Member Exclusive: Check Out Our Top Cycling Stories\"Headshot<\/p>\n

As Deputy Editor, Tara Seplavy leads Bicycling\u2019s product test team; after having previously led product development and sourcing for multiple bike brands, run World Championship winning mountain bike teams, wrenched at renowned bicycle shops in Brooklyn, raced everything from criteriums to downhill, and ridden bikes on six different continents (landing herself in hospital emergency rooms in four countries and counting). Based in Easton, Pennsylvania, Tara spends tons of time on the road and trail testing products. A familiar face at cyclocross races, crits, and bike parks in the Mid Atlantic and New England, on weekends she can often be found racing for the New York City-based CRCA\/KruisCX team. When not riding a bike, or talking about them, Tara listens to a lot of ska, punk, and emo music, and consumes too much social media. \u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"5 min read Cycling radar is an extremely popular accessory for road and gravel bikes. Over the last…\n","protected":false},"author":2,"featured_media":500225,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[569],"tags":[169579,2574,2464,64,63,144836,56250,251604,784,123471,251607,216,251602,2295,57434,251606,108469,251603,251605,216761,251608,112820,85,59884,231,91801,76417],"class_list":{"0":"post-500224","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-cycling","8":"tag-aliexpress","9":"tag-amazon","10":"tag-ant","11":"tag-au","12":"tag-australia","13":"tag-bike-radar","14":"tag-bluetooth","15":"tag-bryton-gardia-r300l","16":"tag-cycling","17":"tag-cycling-radar","18":"tag-cycplus-radar","19":"tag-garmin","20":"tag-garmin-varia-rtl515","21":"tag-gear","22":"tag-gravel-cycling","23":"tag-igpsport-radar","24":"tag-lezyne","25":"tag-magene-l508","26":"tag-magicshine-seemee-r300","27":"tag-radar-taillight","28":"tag-ravemen-radar","29":"tag-road-cycling","30":"tag-sports","31":"tag-superenthusiasts","32":"tag-test","33":"tag-trek","34":"tag-wahoo"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/posts\/500224","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/comments?post=500224"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/posts\/500224\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/media\/500225"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/media?parent=500224"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/categories?post=500224"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/tags?post=500224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}