Troy Lee Designs D4 Polyacrylite Helmet w/ MIPS - Shadow
Troy Lee Designs D4 Polyacrylite Helmet w/ MIPS - Shadow
Troy Lee Designs D4 Polyacrylite Helmet w/ MIPS - Shadow
Troy Lee Designs D4 Polyacrylite Helmet w/ MIPS - Shadow
Troy Lee Designs D4 Polyacrylite Helmet w/ MIPS - Shadow
Troy Lee Designs D4 Polyacrylite Helmet w/ MIPS - Shadow
Troy Lee Designs D4 Polyacrylite Helmet w/ MIPS - Shadow
Troy Lee Designs D4 Polyacrylite Helmet w/ MIPS - Shadow
Troy Lee Designs D4 Polyacrylite Helmet w/ MIPS - Shadow

Troy Lee Designs D4 Polyacrylite Helmet w/ MIPS - Shadow

Regular price$385.00
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Shipping calculated at checkout.

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Troy Lee Designs
D4 Polyacrylite MIPS
Full-Face DH · MIPS C2 · Polyacrylite Shell · Collarbone Suspension
About This Helmet

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, a high-flow front air intake system, and an unmatched anatomical fit.

Highlights
  • Advanced Polyacrylite shell -- D4 safety and comfort at an accessible price point
  • Mips C2 Rotational Impact Brain Protection System
  • Front air intake system with high-flow polymer center and power grid side mesh
  • Collarbone Suspension System
  • Quick-release contoured 3D cheek pads for anatomically optimized fit
  • Anti-microbial padding
  • Breakaway visor screws
Shell and Construction
Shell
Advanced Polyacrylite construction
Suspension
Collarbone Suspension System
Protection
MIPS
Mips C2 Rotational Impact Brain Protection System
Visor Screws
Breakaway -- releases on impact
Ventilation
Air Intake
Front intake system -- high-flow polymer center and power grid side mesh
Fit and Comfort
Cheek Pads
Quick-release contoured 3D for anatomically optimized fit
Padding
Anti-microbial

Shipping Policy

Components:

All component items (wheels, drivetrains, suspension, brakes, etc.) ship within 1–4 business days of purchase.

Bicycles:

Complete bikes typically ship within 2–3 weeks due to build, tuning, and inspection times. You will receive tracking information as soon as your order is ready to ship.

Riding Gear & Apparel:

Riding gear and apparel orders (helmets, jerseys, gloves, etc.) ship within 1–3 business days.

Returns & Exchanges:

If you received the wrong size or wish to exchange an item, it must be returned in original condition—unused, uninstalled, and with all packaging intact.

For full details, please see our Refund Policy before initiating a return.

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Prepared with intention.

Every product is carefully inspected and handled by our team before it ships. From fit and function to final details, we make sure each piece is ready for the outdoors ahead—so you can focus on the experience, not the gear.

Passion drives us

At SpokeX Bike Co., bikes aren't just our business — they’re our way of life. As a rider-owned and operated shop, every decision we make comes from firsthand experience on the trail, at the race, and on the open road. We know what it’s like to chase a new line, push through the pain cave, and celebrate the ride — because we live it every day.


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