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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.
KEY TAKEAWAY
Coospo TR70 gave me about 3 false positives per hour of riding, depending on the area. Its signal is sometimes reflected from cars driving in the opposite direction or by other objects, such as traffic signs. Its accuracy lags behind that of the established Varia radars. The area where TR70 excels is battery life. Still, I think there are better, cheap alternatives out there, such as the iGPSport mini. However, if Coospo improves its accuracy, I would be happy using it as my main radar. Continue reading for more details.
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.
Coospo TR70 Technical Specifications
- Dimensions: 96×39×23 mm
- Weight: 64g
- Claimed battery life: up to 30 hours (day flash)
- Real battery life: 19.5 hours (day flash)
- Charging: USB-C
- Radar: Yes
- Taillight: Yes
- Brake sensing: Yes
- Auto standby: Yes
- Lumens: n/a
- Water resistance: IPX7
- Detecting distance: 140m
- Detecting speed: 6-128km/h
- Viewing angle: 220°
- Horizontal angle: 40°
- Protocols: ANT+, Bluetooth
My Experience with Coospo TR70
Based on my testing, I found the following pros and cons of the TR70.
TR70 Pros
- The app can replace a bike computer by showing cars
- Auto sleep feature
- Changes the light pattern during the entire overtaking period
- Brake sensing feature
- Light modes are slightly customizable
- Safety tether included
- Improves side visibility
- High brightness
- Battery life indicator
- USB-C charging port
TR70 Cons
- Gives about 3 false positives per hour of riding, depending on the area
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 instance, 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 positives per hour of riding. Sometimes, the signal was 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 struggle to bring the firmware to the same level as Western alternatives, resulting in 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 the RTL515 or the 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 because of the relatively low maximum detection speed of 128 km/h (79 mph), 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 day flash mode. It lasted 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 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 that of the Varia RTL515. The flash mode has higher brightness than the solid mode, and the radar also lasts longer in flash mode, so I prefer using it. The following image compares the Coospo TR70, Sigma RECO 81, and Garmin Varia RTL515. While taking the photo, 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 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 customize the light modes slightly, but the default options should be sufficient. The app also lets you enable or disable 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 quite good and didn’t slide on my aero seatpost. However, I haven’t tried it on a rounded seatpost. But considering the quite 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 |
| Sigma RECO 81 | 98.6×19.7×39.5 mm 3.88×0.78×1.56 in | 62g | 21h flash 30h radar only | 14.5 | USB-C | Yes | Yes | Yes | Yes | Yes | n/a | Up to 160m | 5 to 165 km/h (3 to 102 mph) | IP67 | 220° | 60° | Bluetooth, ANT+ | n/a | Garmin | Sigma RECO 81 review | Check Price |
| Garmin RearVue 820 | 98.9×25.9×43.2 mm 3.9×1.0×1.7in | 90g | 24h flash 30h radar only | 18 | USB-C | Yes | Yes | Yes | Yes | Yes | Up to 100 | Up to 170m | n/a | IPX7 | 220° | 60° | Bluetooth, ANT+ | n/a | Garmin | RearVue 820 review | Check Price |
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 should 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 also 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, this is reflected in its accuracy. It gives more false positives than 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.
There are two TR 70s. The first is terrible but the firmware cannot be upgraded. For some reason the new unit has the same name so how can you tell which one you got? I guess they still want to sell the known faulty unit.
Hi Darwin,
The first one I got was the one with the firmware that couldn’t be updated, unless I wanted to instal that “Untrusted Enterprise Developer”. Coospo sent me instructions on how to proceed but I decided to not to. The second unit was the one based on which this review is written.
Let me know if you have any questions.
– Petr
Yes I read that thanks. I got my information from GPLamas review by the way on two versions. Don’t know why they didn’t;t have called the new one the TR 71…I’m assuming the first one you got was the first version of the TR 70.
Oh, I see. I watched his review just now.
I think they didn’t want to confuse customers, but it’s not too transparent. I will probably highlight this a bit more as the older units can still float around. 🙂
I think you need to retest the unit with the latest firmware 1.0.9 .probably you sholud notice less false positive
I might give it a try, but I’ve already spent more time on this radar than I’d like. The firmware should work properly on the first try, not after three updates.
– Petr