Troy Lee Designs
Troy Lee D4 Polyacrylite Shadow MTB Helmet
Item: #2035335 | Part Number: Not Selected$369.99
Description
The Troy Lee D4 Polyacrylite Shadow MTB Helmet delivers elite full-face protection and comfort in a more accessible package. Featuring Mips® C2 brain protection, advanced ventilation, and an anatomical fit, it brings the performance and confidence of premium D4 models to riders seeking serious safety without compromise.
Troy Lee D4 Polyacrylite Shadow MTB Helmet Item # 2035335
Description
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.
Features:
- Mips® C2 Rotational Impact Brain Protection System
- Advanced Polyacrylite shell construction
- Front air intake system, with high flow through polymer center and power grid side mesh
- Collarbone Suspension System
- Breakaway visor screws
- Anti-microbial padding
- Quick release contoured 3D cheek pads for anatomically optimized fit
Part Numbers for Troy Lee D4 Polyacrylite Shadow MTB Helmet
Reviews
Rated 4 out of
5
by
Anonymous from
Comfy, well mad. Trusty TLD you can never go wrong
Very comfy, quality foam. Lightweight despite not being carbon. I love how the cheek pads and liners are removable, just toss em in the laundry machine. The large fit my head perfect but the cheek pads were too loose so I got some medium cheek pads and the helmet fits like a glove now. Only reason it gets 4 stars is because the helmet makes a loud creaking noise when it shakes on my head going through the rough stuff. I think it’s the mips liner rubbing against the inside of the helmet but I could be wrong. Other than that love it and worth the money.
Date published: 2025-09-19
Rated 5 out of
5
by
Kevin L from
Best full face helmet out there
This is my second TLD helmet, the first one being a D3. The D4 fits slightly better, feels a bit more "substantial" in terms of protection, without weighing any more than the D3. It vents a little better than the D3 as well. This is a top quality MTB helmet, and Fortnine offered the best price!
Date published: 2026-01-06
Rated 5 out of
5
by
Am174 from
TLD D4 is top shelf.
I have a big head and have struggled with helmets. This one is a treat. 5min into the ride I forgot I was wearing it. Great helmet!
Date published: 2025-11-18
Rated 5 out of
5
by
teknullog from
Our favorite helmets
We love Troy Lee D4 helmets. We’ve owned many because our son has a gift for landing on his hand. They’ve kept him safe in the Bike Park. We just make sure to replace them after a big crash.
Date published: 2025-09-01
Rated 5 out of
5
by
Andrew from
Troy Lee helmet fit perfectly! Great brand/price.
Awesome helmet for the money. Perfect fit too. Hard to find a quality helmet for $200
Date published: 2025-05-12
Rated 5 out of
5
by
Chickerana from
Like behind a stone wall.
Fits perfectly, you can feel it's quality from the first touch and sight. True DH helmet.
Date published: 2025-05-12