Troy Lee Designs D4 Polyacrylite Shadow 2026 MIPS Adult MTB Helmets Harley-Davidson Low Rider EFI FXDL 2009 Parts Premium 3d Fidlock magnetic buckle

Premium 3d Fidlock magnetic buckle system and composite smart shear screws

Articulated waffle pattern delivers excellent finger traction

you can easily capture every moment without missing a beat

Adjustable snapback closure for a secure

HJ-V12 Integrated Dark Smoke Sun Shield

Troy Lee Designs D4 Polyacrylite Shadow 2026 MIPS Adult MTB Helmets Harley-Davidson Low Rider EFI FXDL 2009 Parts Premium 3d Fidlock magnetic buckleTroy Lee Designs D4 Polyacrylite Shadow 2026 MIPS Adult MTB Helmets The reigning king of full face helmets, the D4 range expands with a Polyacrylite model packing the same safety and comfort features as the premium carbon and composite models into a price conscious shell. Details make the D4 the most coveted full face in mountain biking, including Mips C2 brain protection, an air intake system for ventilation, and an unmatched anatomical fit. Mips C2