TROY LEE DESIGNS D4 Carbon Helmet Cyclops

The D4 Full-Face Helmet continues to dominate downhill podiums and BMX events worldwide, earning its reputation as one of the most advanced and sought-after full-face helmets in mountain biking and BMX racing.

Available in carbon, composite, and polyacrylite constructions, the D4 platform is engineered around a balance of maximum protection, lightweight performance, ventilation, and rider comfort. Every detail of the helmet is designed to meet the demands of elite-level racing and aggressive riding.

Safety remains the highest priority, with the D4 integrating the Mips® rotational impact protection system alongside an EPP-lined chin bar for enhanced energy absorption during frontal impacts. Anatomically shaped cheek pads improve fit and stability while featuring an emergency-release system for safer helmet removal in crash situations.

Features:

• Available in Carbon, Composite, and Polyacrylite shell constructions
• Lightweight race-proven full-face design
• Mips® rotational impact protection system
• EPP-lined chin bar for enhanced impact absorption
• Anatomical cheek pads for improved fit and comfort
• Emergency-release cheek pad system
• Optimized balance of protection, weight, and ventilation
• Designed for elite BMX and downhill competition

Benefits:

• Exceptional impact protection
• Reduced rotational forces during crashes
• Lightweight and stable fit
• Enhanced rider comfort during long sessions
• Improved safety for emergency helmet removal
• Race-ready ventilation and performance

Ideal For:

• BMX Racing
• Downhill Mountain Biking
• Enduro
• Gravity Riding
• Bike Park Riding

The D4 represents the pinnacle of modern full-face helmet design — delivering premium protection, advanced technology, and race-proven performance trusted by top riders around the world.