Bryton Gardia R300L Rear Light & Radar review

A very neat little unit that combines a rear light and radar to keep you better informed about traffic

Bryton Gardia R300 Rear Light & Radar mounted on a bike
(Image credit: Paul Grele)
Cycling Weekly Verdict

A good offering from Bryton which comes very close to the Garmin Varia in terms of performance, and is priced very competitively. Its battery life is a little better than its rival too. You may find that, like me, once you start riding using a radar system you won't want to go back to riding without it.

Reasons to buy
  • +

    Radar functionality provides good additional information to a rider

  • +

    USB-C plugs

  • +

    Solid attachment to the bracket, which is in turn easily fitted to a seat post

  • +

    69 grams or 95g with bracket (for 27.2mm option)

  • +

    Good battery life

  • +

    Competitively priced

Reasons to avoid
  • -

    Not quite as good a light or radar as its main rival, the Garmin Varia, but it's close

You can trust Cycling Weekly. Our team of experts put in hard miles testing cycling tech and will always share honest, unbiased advice to help you choose. Find out more about how we test.

Bryton have been making some of the best cycling computers for a number of years and have decided that now is the right time to release their first rear light and radar unit. 

The R300L features compatibility with ANT+ bike computers as well as Bluetooth to connect to your smartphone, along with innovative alert functions. When using a compatible front light (and computer), ANT+ will allow a network to be formed whereby all the lighting functions can be controlled from the head unit. A built-in G-sensor can detect braking and change the light mode to show this too. 

Thank you for reading 20 articles this month* Join now for unlimited access

Enjoy your first month for just £1 / $1 / €1

*Read 5 free articles per month without a subscription

Join now for unlimited access

Try first month for just £1 / $1 / €1