The Fenix BC06R is a brake-sensing taillight that jumps to 90 lumens on deceleration — useful on roads where following distance is tight. Fits seatposts 25.4–31.6mm and saddle rails 39–50mm, so it covers most setups without an adapter.

• Brake sensing - Automatically boosts to 90-lumen burst when braking; visible up to 100 meters
• Beam angle - 270° coverage; multiple modes including steady, flash, and spinning light
• Runtime - Up to 24.5 hours; charges fully in 2 hours via USB-C
• Mounting - Fits seatposts 25.4–31.6mm and saddle rails 39–50mm; confirm your post diameter before ordering
• Weather resistance - IP66 rated for all-weather use