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Bryton Gardia R300L rear bike light and radar

(106 reviews)

6 modes, brake light, radar

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Ref : 1874188

€96.99 €121.99

Price : €129.95

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Based on 106 reviews

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Bryton Gardia R300L rear bike light and radar

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Bryton Gardia R300L rear bike light and radar

€96.99 €121.99

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The Bryton Gardia R300 is the must-have accessory for riding safely on the road among cars. It allows you to spot approaching vehicles while making yourself visible to other road users via a powerful light and brake light.

Antoine B.

Technology specialist

To cycle safely amongst other road users, cyclists must be as visible as possible with a rear light, such as this Gardia R300L Bryton, which will meet your expectations and more. When paired with a compatible GPS device or a smartphone with the Gardia Bryton app, this radar displays the distance to approaching cars within a range of 150 metres. This speed camera detector will become your best ally in warning you of potential danger, as visual and audible signals will alert you to the approach of a vehicle.

This Gardia R300L Bryton will also ensure you’re clearly visible to other road users thanks to its rear light system. This is designed to catch the attention of motorists from up to 1.6 km away in broad daylight. There are several lighting modes, with adjustable brightness ranging from 0 to 73 lumens, ensuring you’re always visible whatever the conditions. The light automatically adjusts to the ambient light conditions via a sensor to ensure the brightness is as appropriate as possible. This Gardia R300L Bryton also features a brake light that uses a G-sensor. It alerts vehicles approaching from behind to any emergency braking, thereby reducing the risk of a collision.

This Gardia R300L Bryton is compatible with all devices that can connect via ANT+ or Bluetooth, such as Garmin cycle computers. The USB-C rechargeable battery is convenient and offers a good battery life ranging from 24 to 8 hours, depending on usage mode. The remaining battery life is clearly displayed on your device’s screen to prevent your radar from running out of power whilst you’re out cycling. This product is easy to install using an elastic strap that fits all seatposts. In short, this Gardia R300L Bryton is sure to suit all cyclists looking for safety.

Technical specifications:

- Dimensions: 40.0 mm wide, 97.0 mm high, 20.9 mm deep
- Weight: 66 grams
- Lighting modes: High Intensity (8 hours, 20 lumens), Low Intensity (12 hours, 5 lumens), Daytime Flash (17 hours, 73 lumens), Night-time Flash (17 hours, 12 lumens), Group Mode (11 hours, 12 lumens), Light Off (24 hours)
- Water resistance: IPX7
- Field of view: 220°
- LED indicator: ANT+, Bluetooth
- Brake light
- Visual and audible signals to alert vehicles
- USB-C charging
- Brand: Bryton

Frequently asked questions

Want to find out more?

Jusqu’à 190 mètres selon Bryton. En conditions réelles (route droite, pas trop de trafic latéral), la plupart des utilisateurs rapportent une détection fiable de 150 mètres et plus pour les véhicules approchants. Multi-véhicules géré (jusqu’à plusieurs simultanément), avec évaluation automatique du niveau de menace (vitesse relative) et affichage directionnel sur l’écran du compteur compatible.

Ce Bryton Gardia R300L propose 6 modes d’éclairages. En jour flash (73 lumens), il propose une autonomie jusqu’à 17 heures. Nuit flash (12 lumens) : 17 heures. Peloton/group ride (12 lumens) : 11 heures. Haute Intensité (20 lumens) : 8 heures. Faible intensité (5 lumens) : 12 heures. Radar seul : jusqu’à 24 heures.

En usage mixte (flash jour + radar), comptez environ 11–14 heures d’autonomie. Recharge complète USB-C en 3-5 heures. Diminution auto luminosité quand batterie faible. Mode sommeil après 5 min d’inactivité (avec sauvegarde du mode lumière).

Oui. Grâce à la LED CREE haute luminosité, le mode flash interruptif jour est visible jusqu’à 1,6 kilomètres. Freinage automatique (g-sensor) : passage en mode frein rouge intense lors de décélération ou freinage d’urgence.

ANT+ : radar + profil lumière (contrôle modes lumière sur certains).

Il est compatible avec quasi tous les compteurs modernes : les Bryton (Rider series, S-series), les Garmin Edge (830, 1040, etc.), les Wahoo ELEMNT (Bolt/Roam) ou les Hammerhead Karoo.

Bluetooth 5.0 : smartphone (app Bryton Gardia dédiée – alerte visuelle/sonore/vibration sans compteur).

Oui. L’accéléromètre intégré détecte la décélération, avec un flash ou intensité accrue. Fiable pour freinages normaux/urgents. Amélioré via firmwares récents (moins de faux positifs).

Système tout-en-un : Aero-Mount (standard).

D-shape-Mount (tige selle ronde).

Quarter-turn central (solide, mais pas compatible Garmin natif).

Oui. Il propose une résistance à l’eau incidente jusqu’à 1 m pendant 30 min (norme IPX7). Il supporte la pluie forte, mais il faut éviter l’immersion prolongée ou le nettoyage haute pression.

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9.6/10

Based on 106 reviews

REMI S.
Published Sep 19, 2026 at 06:01 pm (Order date: Sep 09, 2026)

5

Top (Translated review)
Thierry C.
Published Sep 05, 2026 at 08:25 am (Order date: Aug 24, 2026)

5

It is great (Translated review)
Jean philippe c.
Published Aug 21, 2026 at 05:52 pm (Order date: Aug 10, 2026)

5

The radar works well. (Translated review)
JEAN-MARIE C.
Published Aug 19, 2026 at 10:42 am (Order date: Aug 06, 2026)

5

Good product, very satisfied. (Translated review)
Jean Claude B.
Published Aug 09, 2026 at 07:34 pm (Order date: Jul 29, 2026)

4

For now, after a few days of use, everything is fine (Translated review)
ERIC S.
Published Aug 06, 2026 at 07:00 pm (Order date: Jul 25, 2026)

5

Easy to use and quick to install. Very useful in use (Translated review)
EMILE B.
Published Jul 31, 2026 at 05:56 pm (Order date: Jul 20, 2026)

5

Very happy with my purchase, works perfectly well for me personally, it remains an essential product to avoid accidents. The price is reasonable, thank you bike material. (Translated review)
Philippe B.
Published Jul 30, 2026 at 09:51 pm (Order date: Jul 19, 2026)

4

Easily installed and connected to the Bryton GPS. Seems okay, but not enough feedback to judge! (Translated review)
Philippe R.
Published Jul 30, 2026 at 06:44 pm (Order date: Jul 18, 2026)

5

Coupled with a Bryton Rider 460E computer. 100% detection of all vehicles. It's not full coverage insurance but it reassures! (Translated review)
Thierry R.
Published Jul 30, 2026 at 05:54 pm (Order date: Jul 20, 2026)

5

Great (Translated review)