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Know what's coming
The CarBack radar and rear light pairs with your smartphone or GPS cycling computer to alert you to detected vehicles and help you stand out on the road. With a simple mount that’s compatible with aero seatposts, a visible battery gauge, a compact profile and industry-leading visibility, CarBack is an easy choice for anyone looking to ride more confidently on shared roads.
"CarBack has functioned superbly"
"Trek has combined their fantastic Flare rear light with a rear-sensing radar for a match made in heaven."
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"you can't go wrong with the CarBack"
"CarBack is a solid product... it works just as well with a phone or a bike computer"
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Go By Bike
Planet Earth is our home and our responsibility – we must do our part to preserve it. Learn how you can join the #GoByBike movement and help make a difference in the future of our planet and all who call it home.
Read moreResponsibility
There's a lot more to Trek than making the world's best bikes and cycling gear. Learn more about everything Trek is doing to make the cycling space safer and more inclusive, plus a whole lot more fun.
Read moreProduct features
Helps drivers see you
Enjoy best-in-class visibility with an interruptive flash pattern that’s daytime-visible from up to 2 km away.
Helps you see cars
CarBack Radar can detect rear approaching vehicles from up to 240 m away.
Visible battery gauge
A four-bar LED battery gauge makes it easy to read your battery status.
Waterproof USB-C charging port
An IPX7 waterproof rating helps ensure trouble-free operation in all conditions, and the USB-C port makes it quick and easy to charge.
Compact design
A smaller profile makes it easier to mount CarBack on smaller frames and with saddle bags.
Universal ANT+ connectivity
CarBack pairs with most major cycling computers, so you can use it with the GPS head unit you already have.
Smart phone compatible
Connect CarBack to your phone through the Trek Accessory App, which will let you see the position of oncoming cars in real time or get audio alerts from your pocket.
Be seen, and see what’s coming
A single light that helps drivers see the rider from further away and helps riders get advance notice of approaching cars equals more confidence on the road with fewer surprises.
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.
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-Poly 3.7Vdc 2000mAh 7.4Wh |
|---|---|
| Milliampere-hour (mAh) | 2000mAh |
| Rechargeable | USB-C |
| Charge time | 4 hours |
| Dimensions | 70 L x 50 W x 25 H (mm) |
| Waterproof Rating | IPX7 |
| Wireless compatibility | ANT+ / Bluetooth |
| Blendr compatible | Yes |
| Weight | 87g |