Did This Radar Live Up to Its Potential?

Cyclists Hub is supported by its readers. We may receive a commission if you buy products using our links.
All content on Cyclists Hub is written by humans, not robots. Learn More

Coospo TR70 is another cheap Chinese radar launched to compete in the cycling radar market. I tested it and compared it with other radars (including the Garmin Varia RTL515) to find out whether it delivers.

My TR70 rating at a glance:
Reliability 3/5 | Multi-object Detection 4/5 | Battery Life 5/5 | Brightness 5/5 | Side Visibility 4/5 | Mount 4/5 | App 5/5 | Price 5/5 | WEIGHTED OVERALL SCORE 4.2/5
More about this cycling radar scoring.

NOTE: I tested this radar with firmware v1.0.8.

Coospo TR70 Summary

Below is the summary of the Coospo TR70 technical specifications.

My Experience with Coospo TR70

Based on my testing, I found the following pros and cons of the TR70.

The box includes a saddle mount (with an aero and D-type adaptor), safety tether, and the radar. Keep in mind that the mount is rotated 90°, so it’s not compatible with Garmin-like units.

In total, I tested 2 Coospo TR70 units. The first one started to behave strangely. Sometimes, I couldn’t turn it off. After several back-and-forth emails with Coospo, it turned out that it was set to factory mode. Coospo provided a list of steps for switching modes, but I didn’t proceed with them. They required installing an app from an “Untrusted Enterprise Developer.” I didn’t want to risk leaking personal data, for example, so Coospo sent a new unit. This was not a good start.

I paired it with my Garmin Edge 840 and started using it. It gave me about three false positive per hour of riding. Sometimes, the signal reflected from a car driving in the other direction, sometimes from a traffic sign, and sometimes from other objects. This is basically the same pattern I see with Chinese radars. Their developers are unable to bring the firmware up to the same level as Western alternatives, leading to more false positives and a worse overall experience.

Some are worse than others. For example, radars such as the Magicshine R300, iGPSport SR30, or Cycplus L7 produce multiple false positives per hour. Then there are radars like the Bryton Gardia R300, Magene L508, or the iGPSport SR mini that work better, but still don’t reach the accuracy levels of RTL515 or Wahoo TRACKR Radar.

In terms of detection distance, TR70 detected cars as quickly as the Garmin Varia RTL515. Both have the same detection distance range. Detecting multiple cars at once also worked fine. TR70 tracked them accurately. This was especially true in bends when the radar could “see” them (unlike when cars are driving behind each other). I tried to replicate this by pointing the radar at a highway, but due to the relatively low maximum detection speed of 128 km/h (79mph), the radar missed cars driving faster. This is where Varia has an edge, as it can detect cars driving up to 160 km/h (99mph).

The battery is supposed to last up to 30 hours in the day flash mode. It lasted me about 19.5 hours. This is an above-average result, but it doesn’t meet the claimed battery life. The following chart shows the battery life of some of the most popular cycling radars.

The Auto Sleep feature should help extend battery life when you often make coffee stops. The radar enters a sleep mode after 3 minutes of inactivity. However, this works only when it’s connected to a bike computer.

TR70’s brightness seems to be the same, maybe even slightly higher than Varia RTL515. The flash has higher brightness than the solid mode, and the radar also lasts longer in flash mode, so I prefer using it. The following picture compares the Coospo TR70, Sigma RECO 81, and Garmin Varia RTL515. While taking it, I noticed something interesting. The TR70 light actually flickers several times per second. I only caught this because of the camera shutter; to the naked eye, the light looks steady. I suspect this “flickering” helps the battery last longer, even when the light appears to be on continuously.

The radar remembers the last used mode and changes the flashing pattern throughout the entire overtaking period. You can control TR70’s light modes from the head unit if it supports this functionality. Bike computers can also wake the radar from standby mode. That’s great!

You can slightly adjust the custom light mode, but the rest of the light modes should be sufficient. The app also lets you turn on and off additional settings and light modes, and it can replace a bike computer by showing you cars like some other radars.

The included seatpost mount was pretty ok and didn’t slide on my aero seatpost. However, I have not tried it on a rounded one. But considering the pretty firm rubber, I believe that if you tighten it well, you won’t experience any issues.

Keep in mind that the Coospo TR70 socket is incompatible with the Garmin quarter-turn mount. It’s rotated by 90°, so you can’t use the same mounts for both radars.

Coospo TR70 vs. Other Cycling Radars

The following table summarizes the technical specifications of the TR70 and other popular cycling radars.

Feature/Radar	Dimensions	Weight	Claimed battery life	Real battery life (day flash)	Charging port	Brake sensing	Auto stand-by	Customizable light modes	Light pattern change when overtaking	App can replace a bike computer	Lumens	Detecting distance	Relative detecting speed	Water resistance	Viewing angle	Horizontal detection angle	Protocols	Detecting frequency	Mount standard	More Info	Buy
Varia RTL515	98.6×19.7×39.6 mm 3.9×0.8×1.6 in	71g	16h flash 22h radar only	9.5¹	MicroUSB	No	No	No	Yes	Yes	Up to 65	Up to 140m	10 to 160 km/h (6 to 99 mph)	IPX7	220°	40°	Bluetooth, ANT+	~24 GHz	Garmin	RTL515 review	Check Price Check Price (rei.com)
Magene L508	94×25×38 mm 3.7×0.98×1.5 in	65g	15h flash 19h radar only	7.3	USB-C	Yes	Yes	Yes³	Yes	No	Up to 40	Up to 140m	10 to 120 km/h (6 to 74 mph)	IPX7	220°	40°	Bluetooth, ANT+	24.05 – 24.25 GHz	Garmin-like rotated 90°	L508 review	Check Price
Bryton Gardia R300L	97×20.9×40 mm 3.82×0.82×1.57 in	66g	17h flash 24h radar only	11.7²	USB-C	Yes	Yes	No	Yes	Yes	Up to 73	Up to 190m	10 to 120 km/h (6 to 74 mph)	IPX7	220°	40°	Bluetooth, ANT+	~24 GHz	Garmin-like rotated 90°	R300 review	Check Price
iGPSport SRTL SR30	99×20.3×39.7 mm 3.9×0.79×1.56 in	68.8g	12h flash 20h radar only	16.9	USB-C	Yes	Yes	No	Yes (just for a few seconds)	Yes	Up to 65	Up to 150m	10 to 120 km/h (6 to 74 mph)	IPX7	220°	40°	Bluetooth, ANT+	~24 GHz	Garmin-like rotated 90°	SR30 review	Not recommended
Trek CarBack	70×30×50 mm 2.76×1.18×1.97 in	70g	12h flash	11.3	USB-C	No	n/a	No	No	Yes	Up to 90	Up to 230m⁴	n/a	IPX7	n/a	n/a	Bluetooth, ANT+	~77 GHz	Proprietary	CarBack review	Check Price Check Price (trekbikes.com)
Magicshine R300	96×29×34 mm 3.78×1.14×1.34 in	110g	16.2h flash 26.3h radar only	9.4	USB-C	No	Yes	No	Yes	No	Up to 300	Up to 140m	10 to 160 km/h (6 to 99 mph)	IPX6	270°	35°	Bluetooth, ANT+	24 – 24.25GHz	Proprietary	R300 review	Not recommended
Cycplus L7	76.5×25×37 mm 3×0.98×1.46 in	67g	25h flash 36h radar only	15.3	USB-C	Yes	Yes	No	Yes	No	Up to 40	Up to 160m	6 to 160 km/h (3 to 99 mph)	IPX6	270°	40°	Bluetooth, ANT+	n/a	Garmin	L7 review	Not recommended
Wahoo TRACKR	77×19×37 mm 3.03×0.75×1.46 in	99g	15h high flash 36h radar only	8.5	USB-C	Yes	Yes	No	Yes	No	Up to 53	Up to 150m	n/a	IPX7	n/a	35°	Bluetooth, ANT+	~24 GHz	Garmin⁵	TRACKR Radar review	Check Price
iGPSport SR mini	77×37×19 mm 3.03×1.46×0.75 in	50g	7h day flash 25 radar only	8.6	USB-C	Yes	Yes	Yes	Yes	Yes	Up to 30	Up to 160m	4 to 110 km/h (2 to 68 mph)	IPX7	220°	45°	Bluetooth, ANT+	n/a	Garmin-like rotated 90°	SR mini review	Check Price
Coospo TR70	96×23×39 mm 3.78×0.91×1.54 in	65g	30h flash 40h radar only	19.5	USB-C	Yes	Yes	Yes	Yes	Yes	Up to 70	Up to 140m	6 to 128 km/h (3 to 79 mph)	IP67	220°	40°	Bluetooth, ANT+	n/a	Garmin-like rotated 90°	Coospo TR70 review	Not recommended

This table compares features of the selected bicycle radars.
¹About two years old unit. The battery depreciation probably influenced the battery life.
²Demo unit – I am not sure if this influenced the battery life.
³Paid subscription or free for email subscription.
⁴The real detecting distance is around 150m, which means more or less the same as other radars.
⁵TRACKR Radar won’t fit Garmin mounts due to wider socket.
Updated: March 6, 2026

Things to Consider Before Buying a Bicycle Radar

Cycling radars have to be highly reliable. They may give you false positives, but they should never give you false negatives, meaning they never miss a car.

You should have zero tolerance for false negatives if you buy a device like a cycling radar. However, you shouldn’t rely entirely on a bicycle radar and use your other senses while riding.

Based on my testing, the TR70 never missed a car but gave me more false positives than some other, more accurate radars.

My Verdict

This radar is cheap. It’s actually one of the cheapest radars yet. Unfortunately, it’s reflected in its accuracy. It gives more false positives than the more premium options, or more refined radars in the same price range, such as the iGPSport SR mini.

So, you have to ask yourself: Am I willing to tolerate more frequent false positives to save money? If the answer is yes, then this radar will provide you with an above-average battery life, so you won’t have to charge it as often. If the answer is no, I recommend choosing a radar from this list of the best bike radars.

Coospo TR70 FAQ

The product for this review was kindly provided by the manufacturer. This did not influence my overall verdict or my opinion about the product. You can learn more about how I approach reviews here.