iGPSport SR30 Review: Just Another Cycling Radar?

iGPSport SR30 review: SR30 bicycle radar mounted on my bike.

CyclistsHub is supported by its readers. We may receive a commission if you buy products using our links (learn more).

iGPSport introduced the SRTL SR30 radar with taillight during the Eurobike 2023 fair. I had my hands on it right there, but it was not available for sale.

However, it has been officially launched, and I tested it for a few weeks. I also have experience with other bicycling radars like the Garmin Varia RTL515, Magene L508, Bryton Gardia R300, and more.

So, in this SRTL SR30 review, you learn how it compares to Garmin Varia and whether it’s worth it or you should buy one of its alternatives.

Spoiler alert: iGPSport SR30 has proven reliable, not missing a single car within its detection capabilities (more about this later). It gives more false positives than Varia but fewer than Magene or Bryton radars. Considering its long battery life and lower price, it belongs among good Varia alternatives. Of course, it has its disadvantages.

Feel free to buy it here or continue reading for more info.

iGPSport SR30 Review: Is It Good Enough?
My video review of iGPSport SR30

iGPSport SR30 Summary

So, how does SR30 differ from other cycling radars? Not much. It has similar specifications and features. See the summary below.

iGPSport SR30 Technical Specifications

  • Dimensions: 39.7×99×20.3mm
  • Weight: 68.8g
  • Claimed battery life:
    • 8 hours solid
    • 12 hours flash
    • 15 hours breathing
    • 18 hours night flash
    • 20 hours radar only
  • Real battery life: 17 hours in flash mode
  • Charging: USB-C
  • Radar: Yes
  • Taillight: Yes
  • Brake sensing: No
  • Auto standby: Yes
  • Lumens: up to 65
  • Light modes: Constant (solid), fleet, breathing, day flash, night flash, radar only
  • Water resistance: IPX7
  • Detecting distance: 150m
  • Detecting speed: 10 to 120 km/h (6 to 74 mph)
  • Viewing angle: 220°
  • Horizontal angle: 40°
  • Protocols: ANT+, Bluetooth

My Experience with SRTL SR30

I used SR30 for about 15 hours with Garmin Varia RTL515 because I consider Varia the most reliable cycling radar. I found the following pros and cons.

SR30 Radar Pros

  • Increased sense of safety
  • Auto sleep feature
  • Long battery life
  • USB-C charging port
  • Safety tether included
  • Improves side visibility as well
  • It remembers the last used light mode

SR30 Radar Cons

  • More expensive than most Asian competitors
  • Unstable mount
  • Light modes are not customizable
  • More false positives than Varia
  • Low maximum detecting speed
  • A short duration of the light pattern change when overtaking
  • Connection and freezing issues

I connected SR30 to iGPSport BSC300 and Varia RTL515 to Sigma ROX 12.1 EVO to watch how quickly and accurately they detect cars.

Mostly, the RTL515 detected cars slightly faster than the SR30. This is surprising because SR30 has a longer claimed detecting distance than RTL515.

This difference may not seem like a big deal at first glance. But every hundredth equals tens of meters for fast-approaching vehicles, giving you less time to react.

But the lower detecting speed is a bigger issue. SR30 won’t detect cars riding faster than 120 km/h (74mph) relative to your speed (more about this later). This speed is the same as on the Magene L508.

Varia can detect cars up to 160 km/h (99mph) for comparison. So, when I compared these two by pointing them on the highway, SR30 didn’t detect many cars because they were going faster than its maximum detecting speed.

Me showing Garmin Edge 840 with connected RTL515 radar and iGPSport BSC300 with connected SR30 radar. Two cars riding on the highway faster than 120km/h. SR30 didn't detect them.
Edge 840 (left) connected with RTL515 and BSC300 (right) connected with SR30, both cars riding over 120km/h (above SR30 detecting capabilities)

As for the ability to detect multiple cars at once, both radars performed very well. I tested this by pointing them at a highway with more traffic.

I was pleased that the SR30 did not give frequent false positives. I averaged about one to three per hour. This is less than, for example, the Magene L508, but I will be testing that again soon to see if there has been a firmware update.

I was most curious about the battery life, as the iGPSport should last up to 18 hours in day flash mode. The reality was that it lasted almost 17 hours in the same mode. This is an excellent result!

It’s worth adding that I tested the radar in summer at temperatures ranging from 20–35°C (68–95°F).

I also want to highlight the auto sleep feature. You can turn it on and off in the app. It ensures that the radar enters a sleep state after being still for 2 minutes and automatically wakes up once it detects vibrations.

It’s a pity that the iGPSport app doesn’t offer the possibility to adjust the light modes like the Magene L508. On the other hand, the preset ones are sufficient.

It can, however, replace a bike computer with its car detection mode.

Another downside of the SR30 radar is the mount. It’s similar to the Varia mount, which is its main weakness. It’s not so firm and tends to slide to the side after sprinting or riding on cobblestones. Gardia’s mount is much better.

The possibility of controlling it via a bike computer worked strangely. BSC300 doesn’t have this functionality, so I paired it with Garmin Edge 840. Sometimes, the radar control widget loaded, and sometimes it didn’t. I couldn’t figure out why. Fortunately, after re-pairing, the control via the bike computer seems to be working properly. However, the radar will remain on after turning the bike computer off.

And lastly, I experienced connection and freezing issues. The radar wouldn’t pair with the BSC300 computer after I disconnected the SR30 from the Edge 840. Turning both the SR30 and BSC300 off and on helped.

Freezing issues manifested themselves in that I could not turn the radar off at all. It would not turn off even after pressing and holding the power button for over a minute. It just had to discharge.

iGPSport SRTL SR30 vs. Other Cycling Radars

The following table summarizes the technical specifications of SRTL SR30 and other popular cycling radars, like the Garmin Varia RTL515, Magene L508, or Bryton Gardia R300.

Varia RTL515Magene L508Bryton Gardia R300LiGPSport SRTL SR30
Dimensions98.6×19.7×39.6 mm
3.9×0.8×1.6 in
94×38×25 mm
3.7×1.5×0.98 in
97×20.9×40 mm
3.82×0.82×1.57 in
99×20.3×39.7 mm
3.9×0.79×1.56 in
Claimed battery life6 hours solid
8 hours peloton
6 hours night flash
16 hours day flash
4-11 hours solid
10-16 hours peloton
15-18 hours quick flash
11-13 hours pulse, flash
10-12 hours rotation
19 hours radar only
8 hours high solid (20 lumens)
12 hours low solid (5 lumens)
11 hours group ride (peloton)
17 hours night flash (12 lumens)
17 hours day flash (73 lumens)
24 hours radar only
8 hours solid
12 hours flash
15 hours breathing
18 hours night flash
20 hours radar only
Real battery life9 hours and 30 minutes in the day flash mode¹7 hours and 20 minutes in the flash mode11 hours and 40 minutes in the day flash mode²16 hours and 55 minutes
Brake sensingNoYesYesNo
Auto stand-byNoYesYesYes
LumensUp to 65Up to 40Up to 73Up to 65
Light modesSolid, peloton, night flash, day flashSolid, peloton, flash, pulse, rotation, quick flash, no light (radar only)High/low solid, group ride (peloton), flash, no light (radar only)Constant (solid), fleet, breathing, day flash, night flash, radar only
Customizable light modesNoYes³NoNo
Detecting distanceUp to 140 mUp to 140 mUp to 190 mUp to 150 m
Relative detecting speed10 to 160 km/h
(6 to 99 mph)
10 to 120 km/h
(6 to 74 mph)
10 to 120 km/h
(6 to 74 mph)
10 to 120 km/h
(6 to 74 mph)
Water resistanceIPX7IPX7IPX7IPX7
Viewing angle220°220°220°220°
Horizontal detection angle40°40°40°40°
ProtocolsBluetooth, ANT+Bluetooth, ANT+Bluetooth, ANT+Bluetooth, ANT+
More infoRTL515 reviewL508 reviewR300 reviewSR30 review
BuyCheck Price
Check Price (rei.com)
Check Price (wiggle.com)
Check PriceCheck PriceCheck Price
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.
Updated on 6.9.2023.

iGPSport SRTL SR30 is larger than most other radars on the market.

It’s not compatible with Garmin mounts because the iGPSport mount is rotated by 90°. This means it’s compatible with Magene mounts.

Me holding the iGPSport SR30 bicycle radar mount.
The iGPSport SR30 mount is compatible with Garmin

SRTL SR30 has 6 modes:

  • Constant light
  • Fleet
  • Breathing
  • Day flash
  • Night flash
  • Radar only

The light changes its flash pattern for about a second when you are overtaken by a car and then returns to the selected light mode. This change does not last for the entire overtaking period, which is a big disadvantage.

SR30 also remembers the last used mode, so you don’t have to switch it like on Varia.

Things to Consider Before Buying iGPSport SRTL SR30 (or Any Other Bike 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. But you also shouldn’t 100% rely on a bicycle radar and use your other senses while riding.

Based on my testing, the SRTL SR30 proved to be reliable within its technical specifications. It did not miss any cars falling within its detection limits.

It gave more false positives than Varia, but only about 1-3 per hour of riding.



The MSRP of the SRTL SR30 is $159.99 (139.95€), which means it is cheaper than Varia but more expensive than Gardia or Magene L508.

This pricing surprises me because SR30 offers no major competitive advantage except for an excellent battery life compared to these radars.

Based on my testing, it lasted almost 17 hours (compared to the claimed 18 hours), making it the best cycling radar in terms of battery life.

It gave me 1-3 false positives per hour of riding, which is more than Varia but less than other cycling radars. However, it has never missed a car*, so I consider it reliable.

*Please remember that it cannot detect cars faster than 120km/h (74mph). This can be an issue on straight roads where drivers ride over the speed limit.

Its multi-car detection was okay, almost meeting the Varia standard. The same applies to the app’s capability.

The SR30 mount slides and requires adjustments during the ride. You also won’t be able to customize the light modes as on Magene L508. I also experienced connectivity and freezing issues.

I think the pricing of the SR30 is a bit unfortunate. It should have cost similar to Gardia or L508. The current price does not match its quality.

On the other hand, many of its drawbacks could be fixed with firmware updates similar to what was done with the Magene L508. So we’ll see if iGPSport improves it over time.

I hope this review helps you in your decision. If you decide to purchase the iGPSPort SR30, please consider using the link below. You will be supporting cyclistshub.com for no extra cost. Thanks.

About The Author

4 thoughts on “iGPSport SR30 Review: Just Another Cycling Radar?”

  1. Profile picture of Petr Minarik - the founder of cyclistshub.com

    Very detailed and comprehensive review. From your previous comparisons of bike radars I still think Gardia is the best non-Garmin alternative. Not just for the price, but USB C is a must these days. IMO.

    1. Profile picture of Petr Minarik - the founder of cyclistshub.com

      Hi Andrew,
      Thank you. 🙂 Considering it was a demo unit without firmware updates, then probably yes. Luckily, I already have a final production unit so I will update the review soon. For me, the best thing about Gardia is its mount.
      – Petr

  2. Profile picture of Petr Minarik - the founder of cyclistshub.com

    Thats a pretty cool little doohickey right there. Add that to an on board video link and you have enough tech to provide advance warning of being run down by a vehicle whilst simultaneously recording the moment of your death.excellent. More tech. More tech!!

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top