Lezyne Ktv Pro+ Ai Alert Rear Black, One Size

"What Our Gearhead® Experts Are Saying:""I have been running the KTV Pro+ Ai Alert Rear on my commute and the brake sensing feature is genuinely impressive in real world use. Every time I slow for a light or a turn it kicks into Active Alert mode automatically, and I have had drivers behind me react visibly faster than they did with my old taillight. The integrated USB stick makes charging painless and the IPX7 rating means I never think twice about riding in the rain.""Most taillights do one thing, they tell the world you are there. The Lezyne KTV Pro+ Ai Alert Rear does something more useful, it tells the world you are slowing down. The Ai Alert system uses brake sensing technology to automatically detect deceleration and switch into Active Alert mode, a rapid 150 lumen flash that communicates your stopping intention to drivers and riders behind you the same way a brake light does on a car. That information gap between a cyclist braking and the traffic behind them reacting is exactly where accidents happen, and the KTV Pro+ Ai Alert closes it without any input from the rider. Beyond the Ai Alert system the light covers the full range of what a premium taillight needs to do. Wide Angle Optics spread visibility across 270 degrees so you are seen from behind and from the side, six combined solid and flash modes including a highly disruptive Day Flash give you options across every light condition, and IPX7 waterproofing means wet weather riding is never a concern. The co-molded construction is lightweight and durable, the silicone rubber strap fits aero and round seatposts, and the integrated USB stick charges cable-free without hunting for a cord. Up to 20 hours of runtime in Femto mode means this light goes weeks between charges on typical use."

Price: $44.99 from Backcountry