This product has been discontinued
Troy Lee D4 Polyacrylite Stealth MIPS MTB Helmet Item # 1087185
Description
The Troy Lee D4 Polyacrylite Helmet - Stealth Edition - with MIPS technology is the reigning King of MTB Full Face protection.
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:
- MTB Preferred style: Downhill, BMX
- 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
Note: Not intended for use with motorized vehicles
Part Numbers for Troy Lee D4 Polyacrylite Stealth MIPS 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
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