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Trek / Bike Lights

Trek Ion 100 R Front Bike Light

A compact, USB-C rechargeable front light that easily attaches to any handlebar for visibility up to 900 meters away during the day.

$44.99

In stock today at Alpharetta · Ansley · Roswell · Vinings

Free pickup at any of our four stores. Questions? We're happy to help.

About this product

The details.

Be-seen safety for the city

The Ion 100 R front light is daytime visible and designed for the city. Focused optics and an interruptive flash pattern make it visible from up to 900m during the day. Integrated side lighting help add visibility while the front hood keeps light out of t

An LED fuel gauge makes it easy to see battery status for the up to 24-hour run time. Blendr compatibility and included quick connect mount offers simple removal for recharging via the included USB-C cable.

Product details

Specifically designed focus, flash, and range flash patterns for powerful daytime visibility for up to 900m away
Increased battery capacity offers up to 36% more run time than previous generation
Visible fuel gauge LEDs make it easy to see the up to 24 hour battery status
Integrated side lighting for added visibility from more angles, perfect for city and urban use
Blendr compatible for mounting to handlebar, stem, or helmets with optional accessories
100LM Day Steady - 2hrs, 5LM Low Steady - 24hrs, 100LM Day Flash - 11hrs, charge time 2hrs
Hood design helps keep light out of your eyes
Includes quick connect mount and USB-C charging cable (2hr charge)

What makes it special

The little details. The big difference.

01
See me now
Research shows that riding with a flashing, daylight-visible rear light is the single most effective measure a cyclist can take to increase their likelihood of standing out to drivers.
02
Daytime Running Lights
Trek daytime running lights are compact and powerful and feature an interruptive flash pattern that's daytime visible from up to 2km away.
03
240% more noticeable
When you use a flashing tail light during the day, studies show you’re up to 240% more noticeable than a rider using no lights at all.
04
USB-C charging
Recharging is fast and easy with an included USB-C cable.
05
Visible battery gauge
A four-bar LED battery gauge lets you know when it's time to plug in.
06
Lumens that last
Select your mode and ride with confidence knowing your light will last hour after hour.

The details

Good to know-

Specs8

Battery: 350Li-Ion
Milliampere-hour (mAh): 350mAh
Rechargeable: Yes
Charge time: 2 hours
Dimensions: 36.5 L x 29.7 W x 36 H (mm)
Waterproof rating: IP46
Blendr compatible: Yes
Weight: 48.0g

Good to know5

Ride Safer Accidents don’t have to happen.Stand out on the road, and increase your confidence in the saddle.
Light Guide Do you need to be seen or do you want to illuminate the darkest trail or street? There is a light for you.
30-Day Unconditional Guarantee If for any reason you're not satisfied with a Bontrager or Trek aftermarket purchase, return the item, along with the original sales receipt to the original place of purchase within 30 days for an exchange or refund. Think of it as a 30-day test ride.
Peruse the product manual Whether you're looking for instructions on how to reset your cyling computer, charging guidelines for your light, or anything in between, we're here to help. Click on the link to download the product manual.
Blendr integration Blendr compatibility makes clean installation on any bike a breeze.

What reviewers are saying.

“Best daytime front bike light”
When my wife met me mid-day in the desert as I rode across Oregon, she immediately remarked on how far away she was able to spot me. I’ve been sold on these ever since…
velo.outsideonline.com · Read the review
“Trek also announced big updates to its Ion 100 R and Flare R City daytime running lights”
The biggest change is the 25% boost in run time, which is now claimed to be as much as 10 hours in daytime flashing mode.
nminus1bikes.substack.com · Read the review
“No matter the type of riding I’m doing, my bike always has DRLs”
I can attest that DRLs [Daytimne Running Lights] have saved me from being hit more times than I care to count. They help drivers see me coming and better judge my oncoming speed so they don’t pull out in front of me.
roadbikerider.com · Read the review
“Trek Ion 100 R and Flare R bring some modern updates to the longtime favorite lights.”
Compact form factor that is is easy to mount with Blendr compatibility... USB-C ports with longer runtime and faster charging... Daytime bright with eye catching flash mode
thesweetcyclists.com · Read the review
“If you ride in the city, you know visibility is everything”
Trek’s research-backed flash pattern, focus, and range make these lights stand out even in broad daylight.
bikehugger.com · Read the review
“A combination of a highly efficient reflector and disruptive flash patter”
Lofty claims for sure but in my experience, they ring true. Motorists seem to have better awareness when you’ve got a visible light during the day and this one is definitely visible.
velo.outsideonline.com · Read the review