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Mantel's choice
Rainy tip
1/14
RRP 59,99
39,95
In-store stock
Trek Flare RT Rear Bike Light € 39,95
Arnhem
Now open until: 17:00
In stock
Den Bosch
Now open until: 17:00
In stock
Rotterdam
Now open until: 17:00
In stock
Utrecht
Now open until: 17:00
In stock
Stock check Saturday 27 September at 16:34.
It is not possible to reserve in-store stock for your store visit.
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- Ordered now, delivered on Monday
- Free tracked shipping over € 49,-
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Our choice for a rear light with connectivity functionality
This rechargeable Trek Flare RT isn't just 36% smaller and 30% more powerful, it also has clever connectivity functionality. You can easily pair it with your Garmin, Trek or Bontrager ANT+ device, and then use it to control your daytime running lights and to check your battery status.
You'll always be clearly visible with its 2 kilometre range, automatic brightness adjustments and extra 30 minutes of battery life at low battery levels. Plus, charging is easy in all weathers thanks to the waterproof USB port.
Pros & Cons
Pros & Cons
- Ideal city and day light: visible up to 2 km in the brightest flash mode.
- Easy to pair with your Garmin and Bontrager ANT+ devices for turning on and off or to check the battery status.
- The Quick Connect bracket makes it easy to mount and remove from your handlebars.
- The light sensor adjusts the brightness to your surroundings.
- The daytime running light mode can blind other road users if you use it in the dark.
Specifications
Specifications
| Brand | Trek | |
| Light Output in Lumen | Being seen in urban environment: 0 - 100 lumen | |
| USB rechargeable | Yes, Micro-USB | |
| Compatibility | Yes, with cycling navigation with Bluetooth/ANT+ | |
| Max. Battery Life highest mode | 4 hours | |
| Max. battery Life lowest mode | 13 hours | |
| Flashing Mode | Yes | |
| Lateral visibility | Good | |
| Brake light feature | No |
The brand new Bontrager Flare RT is 36% smaller, 30% more powerful and has 20% longer battery life than its predecessor. In addition, the Flare RT, unlike the Flare R, can also be connected to your Garmin and Bontrager ANT+ devices. This makes it easy for you to switch on the daytime running lights or check the battery status.
The Bontrager Flare RT is ideal for use in an urban environment or during the day. Due to its specific brightness, light pattern and range, you are visible from a distance of up to 2 kilometres during the day. The integrated light sensor automatically adjusts the brightness to the ambient conditions.
Thanks to its battery safety mode, the Flare RT has an additional battery time of 30 minutes when it hits 5 percent battery capacity. As a result, you'll never be without lights when you're on the move. At a continuous 25 lumens, the battery will last approximately 4-5 hours. At a capacity of 5 lumens, this transforms into 13.5 hours. The flashing mode has a maximum capacity of 90 lumens. In this mode, the battery will last approximately 6 hours. With the USB cable, the light is easy to charge. The USB port is waterproofed for ease of use as well. So you can ride in wet conditions without worries.
The Bontrager Flare RT is ideal for use in an urban environment or during the day. Due to its specific brightness, light pattern and range, you are visible from a distance of up to 2 kilometres during the day. The integrated light sensor automatically adjusts the brightness to the ambient conditions.
Thanks to its battery safety mode, the Flare RT has an additional battery time of 30 minutes when it hits 5 percent battery capacity. As a result, you'll never be without lights when you're on the move. At a continuous 25 lumens, the battery will last approximately 4-5 hours. At a capacity of 5 lumens, this transforms into 13.5 hours. The flashing mode has a maximum capacity of 90 lumens. In this mode, the battery will last approximately 6 hours. With the USB cable, the light is easy to charge. The USB port is waterproofed for ease of use as well. So you can ride in wet conditions without worries.
• Fits 22.2 mm to 35 mm seat posts
Bike lights buying guide 2023-2024 - Hit the road safely!
Read moreReviews
Reviews
Average from 278 reviews
Photos from customers
Most recent reviews
4 / 5
Good rear light with indicator function
- Johannes 22 September 2025
Good price/performance. I would buy again.
Automatic translation
4 / 5
Quick to install, very inconspicuous in terms of size and very visible in terms of effect.
- Daniel 21 September 2025
I can recommend it without any problems!
Automatic translation
5 / 5
Small, light, very good and widely visible - top!
- Stefan 14 September 2025
Visibility and therefore my safety during the day are important to me. Top rear light!
Automatic translation
5 / 5
Recommended. Could be 'upgraded' with ANT+ support
- Giuseppe 9 September 2025
Satisfied with the product, its operation and value for money. Only flaw, it could be made compatible with all ANT+ devices, rather than having only BT and one proprietary control device.
Automatic translation
5 / 5
Top light
- Luc 6 September 2025
Meanwhile, is my 2nd rear light from Trek. Replaced the first one because the battery didn't work long enough.
Pros & Cons
This light makes you highly visible
Automatic translation
Frequently bought together
Frequently bought together
Recommended by the product specialist
Recommended by the product specialist
Related products
Related products
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| Trek Flare RT | BBB Cycling SignalBrake BLS-167 | SKS Infinity Universal | Sigma Nugget II Flash | |
| 278 reviews | 5 reviews | 27 reviews | ||
| Light Output in Lumen | Being seen in urban environment: 0 - 100 lumen | 50 lumen | 30 lumen | Being seen in limited lighted environment: 100 - 400 lumen |
| USB rechargeable | Yes, Micro-USB | Yes, Micro-USB | Yes, Micro-USB | Yes, Micro-USB |
| Compatibility | Yes, with cycling navigation with Bluetooth/ANT+ | None | None | None |
| Max. Battery Life highest mode | 4 hours | 4 hours | 5 hours | 2 hours |
| Max. battery Life lowest mode | 13 hours | 42 hours | 5 hours | 8 hours |
| Flashing Mode | Yes | Yes | No | Yes |
| 39,95 | 29,95 | 28,95 | 11,95 | |
| This product | View product | View product | View product |
All specifications
General
Brand
Trek
Compatibility
Yes, with cycling navigation with Bluetooth/ANT+
Lateral visibility
Good
Radar feature
No radar function
Mounting location
Seatpost
Colour
Black
Weight
40 grams
Light Type
Detachable light
Mount(s)
Elastic Band / Strap
Power supply
USB rechargeable
Yes, Micro-USB
Max. Battery Life highest mode
4 hours
Max. battery Life lowest mode
13 hours
Power Source
Internal Battery
Properties
Battery indicator
LED
Connectivity
Connector plug
USB
Functions
Flashing Mode
Yes
Brake light feature
No
Daytime running lights
Yes
Number of Modes
2
Smart Bike Light
Yes
Lighting
Light Output in Lumen
Being seen in urban environment: 0 - 100 lumen
Water resistance
IPX7: immersion-proof
Amount of lumen
90
Certifications
StVZO certification
No