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Trek CarBack Radar/Tailight (Like eyes in the back of your head!)

Trek CarBack Radar/Tailight (Like eyes in the back of your head!)
  • The screenshot shows the CARBACK used with a Garmin computer, and includes the option
Color: Black
Please select options Unavailable


Know what's coming.

Ride with extra confidence with Trek CarBack Radar Rear Light. CarBack's radar helps detect rear-approaching vehicles from up to 500ft and provides audio and visual alerts through paired GPS head units for increased on-bike awareness.

Built with integrated best-in-class Daytime Running Lights that are visible from up to 2km away, CarBack is a must-have for every cyclist riding on shared roads.

- CarBack can detect and alert riders of rear-approaching vehicles from up to 500ft away
- Compatible with most cycling GPS computers
- Pair CarBack with the Trek Accessory app to see a vehicle's rear-approaching and passing distance on your smartphone
- Designed with focus, flash, and range to be Daytime-visible from up to 2km away
- Four light flash modes: Day Flash 90LM, Day Steady 25LM, Night Steady 5LM, and Night Flash 5 LM
- Visible fuel gauge LEDs make it easy to see CarBack's 7+ hour battery status
- IPX7 waterproof rating to confidently ride through wet conditions
- Includes Quick Connect Plus rear mount and USB-C charging cable

Super-easy charging; USB-C cable is easiest to plug in

7 hours with both Radar and Tail Light active

Any GPS bike computer that works with a Garmin Varia will work with the Trek CARBACK

Garmin invented bike Radars; Trek has perfected it. Detects cars further away. 

With both a light and radar built into one unit, fewer things to attach to your bike

See what's coming, and not just "a" car, but this will tell you how many are coming up behind! No more surprises. 

Buy with confidence; this is a Trek product with a two year warranty! Compare that to other manufacturers who offer only a one year warranty. 

Chain Reaction has confirmed the Carback can be charged while in use, for those doing double-centuries (or rides over 7 hours in general). An inexpensive 10,000mah phone backup, put in your seatbag, and a 1ft charging cord attached to your backup and you're good for 24-hours of ride time!


A real-world demonstration of why you need a Trek CARBACK! This is Skyline Blvd near Skeggs.

A great demonstration of the CARBACK's radar technology in the real world. The video is not a feature of the CARBACK (we're using a Garmin 715 with integrated camera in the rear, with a GoPro Hero9 up front), but the information recorded at the bottom of the video is all recorded to your bike computer's ride file. You can also view the car's speed, the difference between the car's speed and your speed, how far back the car is, and how many cars passed you on the ride. The app that gives you all that info in real time is "My Bike Radar Traffic" found in Garmin's IQ store. Works great with the Trek CARBACK!

Part Numbers

Option UPC MPN Store SKU
Black 601842935989 5313794 LIG45441554K