Troy Lee Designs D4 Helmet

The D4 is built specifically for high-intensity gravity riding, including downhill mountain biking and BMX. Its aerospace composite shell and full-face coverage are engineered to handle the higher speeds and impact risks associated with these disciplines.

The Mips C2 system is a low-friction layer inside the helmet that allows for 10-15mm of omni-directional movement during an impact. This helps reduce the harmful rotational forces transferred to your brain, which is a critical factor in many cycling accidents.

Yes, it is designed for airflow. With 20 high-flow intake and exhaust ports, it moves a significant amount of air to keep you cool. Additionally, the interior uses X-Static and XT2 antimicrobial padding, which helps manage moisture and odor during long, sweaty sessions.

Yes, the helmet features quick-release 3D cheek pads. These are designed to be easily removed by medical personnel in an emergency, allowing them to take the helmet off more safely without putting unnecessary strain on your neck.

The D4 comes with internal cavities specifically designed for audio integration. This makes it straightforward to install most standard helmet-compatible communication or audio systems.

This helmet is highly certified for gravity sports, meeting CPSC 1203, CE EN 1078, ASTM F1952-15 (downhill mountain bike racing), ASTM F2032-15 (BMX), and ASTM F2040-11 standards.