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⚠️ Warning
Cancer and Reproductive Harm / Cancer et dommages sur l’appareil reproductif / Krebs und reproduktive Schäden / Cáncer y daños repro-ductivos: www.P65Warnings.ca.gov
"The perfect option for trying out night riding"
"The warmth [LED color] works really well, helping my eyes map trail definition on dark evenings."
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"Ion Pro takes the whole cake"
"As far as self-contained lights are concerned, the Ion Pro takes the whole cake."
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4.5/5
"A ton of light for confident high speed riding" [November 2018 Issue]
"Bright and easy to use"
"Bontrager's Ion Pro RT doesn't take up much space, but it's bright enough for trail riding"
Read moreAll your favorites, all in one place
Get all your favorite apparel from over 80 of the world's best cycling brands delivered right to your doorstep or local Trek retailer when you shop our curated online collection. If you're not 100% satisfied, you can return your purchase within 30 days for a full refund.
Shop all gearThe always-on team
Research shows the single most impactful measure you can take to stand out to motorists is to use front and rear Daytime Running Lights. The team uses them on every training ride, any time of day—and they’ve found that these lights truly make a difference.
Read moreHow to mount your lights
Where and how you mount your lights can make a huge difference. Follow these steps to ensure you get the best visibility from your lights.
Learn moreHow to be seen
Using lights and wearing hi-vis apparel on every ride can help you stand out to drivers.
Learn moreProduct features
Double-click
A double-click on switch helps eliminate the possibility of accidental operation and battery depletion while in transport.
Lumens that last
Ion Pro RT provides consistent brightness throughout its runtime to provide meaningful power that lasts. It literally outshines the competition.
Daytime Running Lights
Bontrager and Trek daytime running lights are compact and powerful and feature an interruptive flash pattern that's daytime visible from up to 2km away.
Flash, focus, range
Not all lights are created equal. A true DRL is designed with specific focus, flash, and range to be seen from a meaningful distance during the day. Without these three things, you just have a light.
Daytime Running Lights
Not all lights are created equal. Bontrager and Trek Daytime Running Lights are designed to be visible whenever you ride, day or night.
Read more30-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.
Learn morePeruse the product manual
Whether you're looking for instructions on how to reset your cycling computer, charging guidelines for your light, or anything in between, we're here to help. Click on the link to download the product manual.
Learn more| Battery | Li-Ion 21700 3.7Vdc 5000mAh 18.5Wh |
|---|---|
| Milliampere-hour (mAh) | 5000mAh |
| Rechargeable | Micro-USB |
| Charge time | 7 hours |
| Dimensions | 102.5 L x 30.2 W x 34.7 H (mm) |
| Waterproof rating | IPX4 |
| Wireless compatibility | ANT+ / Bluetooth |
| Blendr compatible | No |
| Weight | 192g |