Strip Pro Ai Alert 400+ Rear

What Our Gearhead® Experts Are Saying:

"The Strip Pro Ai Alert 400+ Rear is what I recommend to any road rider who spends meaningful time in traffic and wants their rear light to do more than just flash. The Ai Alert brake detection is immediate and accurate in real riding conditions, the Active Alert flash at 150 lumens is impossible to miss, and the 270 degree Wide Angle Optics across ten LEDs mean visibility is not just rearward. At 71 grams and with 80 hours of Femto runtime it is a set and forget safety system that earns its place on every build."

Presence and intent are two different things, and a standard taillight only communicates one of them. The Lezyne Strip Pro Ai Alert 400+ Rear communicates both. The Ai Alert brake sensing system detects deceleration events automatically and transitions into Active Alert mode without rider input, producing a rapid 150 lumen flash that signals stopping intent to drivers and cyclists behind with the immediacy of a dedicated brake light. That communication happens in the moment it is most needed, before the gap between rider and following traffic has closed, and it does so without requiring the rider to activate anything or take attention away from the road ahead. The system is pre-programmed from the factory and collects no rider data.

Ten super-bright LEDs spread across Wide Angle Optics deliver 270 degrees of visibility, ensuring the light registers to traffic approaching from behind and from oblique angles with equal effectiveness. Seven combined solid and flash output modes provide a full range of options from the 400 lumen Day Flash mode, designed to cut through ambient daylight and demand attention in busy urban conditions, down to the 80 hour Femto mode that runs through weeks of regular riding on a single charge. The 1900 mAh battery charges via a waterproof USB-C port, and the co-molded IPX7 rated construction keeps everything sealed and functional through sustained wet weather riding at a total weight of 71 grams. The silicone rubber mounting strap secures to aero and round seatposts without tools and transfers between bikes in seconds, making the Strip Pro Ai Alert 400+ Rear as practical to live with day to day as it is effective when traffic demands the most from a rear lighting system.