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    • Troy Lee Designs D4 Composite Helmet 2021


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  • Troy Lee Designs D4 Composite Helmet

    A classic of the mountain bike world, the Troy Lee Designs D4 Composite Helmet has a well-won reputation for delivering superb levels of comfort, protection and distinctive style. Pull it on and go get your mountain bike thrills in style. 

    No matter where you get your mountain bike thrills, from weekend races on challenging downhills through to racing buddies to the bottom at the local trail centre or bike park, the D4 Composite Cycle Helmet has you covered. Confidence is given a boost thanks to its superb combination of safety features, unrivalled comfort and the usual Troy lee flair for design. 

    Keeping weight low but protection and durability high is the aerospace-grade fibreglass composite shell. This wraps around an impact-absorbing EPS foam core - the forces from any crash are absorbed and dissipated by this core, offering outstanding crash protection. Meanwhile, breakaway screws prevent the visor from catching on the ground and help prevent neck injuries. Lastly, MIPS (Multi-directional Impact Protection System) provides excellent brain-injury prevention - more on that below.

    What is MIPS?

    Multi-directional Impact Protection System (MIPS) is a proven system that reduces the rotational forces on the brain when you're involved in a crash. The forces are absorbed and redirected to prevent them from being transmitted to the brain.

    MIPS is a Brain Protection System

    Rotational motion can cause brain injuries

    The low friction layer allows a sliding movement of 10–15 mm, in all directions, reducing rotational motion to the brain during impact

    MIPS adds protection

    Uncompromised Comfort

    With this level of protection and head protection, you may think ventilation is compromised. But not a bit of it. Troy Lee have carefully engineered the outer vents and inner channels to work with the headliner so fresh air is free to circulate and keep you cool.

    Inside the D4 you'll also enjoy the brilliant XT2 washable liner. Lesser helmets will use standard foam liners which after continued use can soon start to feel uncomfortable and even itchy. Not the XT2. This anti-bacterial liner ensures no nasty odours or itchiness, and being washable you'll be able to keep it fresh for every ride.

    Tough, durable, protective and yet lightweight, the D4 Composite is the ideal full-face helmet for the weekend DH racer and avid mountain bike trail slayer.


    • Aerospace shell design and materials (D4 Composite)
    • MIPS C2 brain protection system
    • Front air intake system with high flow through polymer centre and power
      grid side mesh
    • Collarbone suspension system
    • Breakaway visor screws
    • X-static® and XT2® Anti-Microbial/anti-order padding
    • Quick-release contoured 3D cheek pads create an anatomically optimized fit
    • Weight - 1050g
    • CPSC 1203*, CE EN1078*, ASTM F1952 - DH, ASTM 2032 - BMX, *Varies by regional standards

    Buy Troy Lee Designs from Chain Reaction Cycles, the World’s Largest Online Bike Store.


    • Colour: STEALTH GRAY, Exile Black, Graph Marine
    • Clothing Size: M, S, L, XL
    • Gender: Unisex



  • C$656.49 656.49
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