handy daytime/city light. Useful charging level leds, seems to last a day nicely. No control from your head unit, but that's the only downside.
Product Details
Trek Ion 100 R Front Light
Delivering up to 100 lumens with focused optics and a dynamic flash pattern, the Trek Ion 100 R Front Light ensures you're seen from up to 900 metres away, even in daylight. The smart hood design prevents glare by keeping light out of your eyes, while integrated side lighting enhances your visibility from multiple angles, perfect for navigating busy streets and intersections safely.
With a battery life of up to 20 hours, a visible LED fuel gauge, and 28% more run time than the previous model, the Ion 100 R is designed for daily dependability. Recharging is quick and easy via the included USB-C cable, and Blendr compatibility allows for clean mounting on your handlebars, stem, or even helmet with optional accessories. Lightweight, weather-ready, and designed for real-world riding, this light is a must-have safety upgrade for any urban cyclist.
Included:
- Ion 100 R Front Light
- Quick-connect bracket
- USB-C charging cable
Features
- Specifically designed focus, flash and range flash patterns for powerful daytime visibility for up to 900 m away
- Increased battery capacity offers up to 28% more run time than the previous generation
- Visible fuel gauge LEDs make it easy to see the up-to-20-hour battery status
- Integrated side lighting for added visibility from more angles, perfect for city and urban use
- Blendr-compatible for mounting to handlebars, stems, or helmets with optional accessories
- 100 lm high beam – 2 hrs, 5 lm low beam – 20 hrs, 100 lm flash – 9 hrs
- Charge time: 1.5 hrs
- The hood design helps keep light out of your eyes
- Dimensions (mm): 36.5 L x 29.7 W x 36 H
- Weight: 48g
Specifications
- Power Source Type
- Rechargeable Battery
- Primary Product Type (Electronics)
- Bike Light
- Battery Life (Typical Use, Hours)
- 20 hrs
- Beam Pattern / Use
- Daytime Flash
- Charging Interface
- USB-C
- Dimensions (L x W x H mm)
- 36.5 x 29.7 x 36
- Discipline Compatibility
- Road, Commute
- Display Type
- No Display
- Maximum Light Output (Lumens)
- 100 lm
- Mounting Location
- Handlebar, Helmet
- Mounting Location (Lights)
- Handlebar, Helmet
- Number of Modes
- 3
- Runtime at Max Mode (Hours)
- 2 hrs
- Weight (g)
- 48 g
- Product code
- 1942688 / 54293849899354
Reviews
Shipping & Returns
Free UK delivery on orders over £50. Orders are dispatched within 1-2 working days and typically arrive 1-2 working days later.
Return unused items in their original packaging within 30 days of delivery. Return postage is £3.50.
Q & A
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About Trek
The best bike, ridden everywhere.
Founded in a Wisconsin barn in 1976, Trek has grown into one of the world's most recognised bicycle brands without losing the obsession that started it all: build the best bike, ride it further, share it with everyone.
Trek believes the bicycle is a simple solution to many of the world's most complicated problems. Every bike Trek builds — from the Madone race weapon to the Marlin trail bike — is made with that conviction. More riders, more often, on better bikes.





