Strip Pro Ai Alert 400+ Rear

What Our Gearhead® Experts Are Saying:

"The Ai Alert feature on the Strip Pro 400+ Rear is the real deal in traffic. Every time I brake it kicks into Active Alert mode instantly and the drivers behind me respond noticeably faster than they did with my old taillight. The 270 degree Wide Angle Optics mean I am visible from the side as well, and 80 hours of Femto runtime means I almost never think about charging it."

The gap between a cyclist braking and the driver behind them reacting is where preventable incidents happen, and the Lezyne Strip Pro Ai Alert 400+ Rear was built to close it. The Ai Alert brake sensing system detects deceleration automatically and shifts into Active Alert mode without any rider input, triggering a rapid 150 lumen flash that communicates stopping intent to traffic and fellow cyclists the way a brake light does on a car. The system comes pre-programmed, requires no setup, and collects no rider data.

Ten super-bright LEDs deliver a beam pattern optimized for light dispersion across 270 degrees of Wide Angle Optics visibility, ensuring presence is communicated not just to traffic directly behind but to vehicles and riders approaching from angles. Seven combined solid and flash output modes span from the 400 lumen Day Flash mode for maximum daytime conspicuity down to the 80 hour Femto mode for extended runtime on commutes and touring. The co-molded construction keeps the whole package at 71 grams with full IPX7 waterproofing, waterproof USB-C charging handles recharging without a proprietary connector, and the silicone rubber strap mounts securely to aero and round seatposts without tools.