Troy Lee Designs - D4 Polyacrylite Fifty-50 MIPS Helmet (MTB)
SKU: 28850366111

Troy Lee Designs - D4 Polyacrylite Fifty-50 MIPS Helmet (MTB)

Sale price$112.05 Regular price$124.50
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

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Description

Troy Lee Designs - D4 Polyacrylite Fifty-50 MIPS Helmet (MTB)Troy Lee Designs D4 Polyacrylite Fifty 50 MIPS Helmet (MTB) D4 Polyacrylite Fifty 50 MIPS Helmet is a Troy Lee Designs mountain bike helmet built for trail riders. The D4 platform is known for downhill focused coverage and a locked in feel when the terrain gets steep and fast. The Polyacrylite shell helps keep the price more approachable while still delivering the coverage riders expect. The Fifty 50 treatment gives this helmet a more individual feel

Troy Lee Designs - D4 Polyacrylite Fifty-50 MIPS Helmet (MTB)

D4 Polyacrylite Fifty-50 MIPS Helmet is a Troy Lee Designs mountain bike helmet built for trail riders. The D4 platform is known for downhill-focused coverage and a locked-in feel when the terrain gets steep and fast. The Polyacrylite shell helps keep the price more approachable while still delivering the coverage riders expect. The Fifty-50 treatment gives this helmet a more individual feel than a plain solid option. The MIPS-equipped build adds another layer of confidence for riders who prioritize modern helmet technology.

The fit is aimed at riders who need their MTB helmet to stay composed on technical descents while still feeling comfortable during transitions, climbs, and longer days outside.

Why We Like It: it balances mountain bike protection with the kind of ventilation and fit that keeps longer rides from feeling like work.

Why It’ll Work for You: This is a strong pick when you want a mountain bike helmet that feels at home on everything from rough local descents to destination riding.

Variants / Options: multiple sizes and colorways available; check the selector for current stock.

Key Features:
  • 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 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

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 28850366111

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Wells Plumbing WP10 - Ted
Phoenix, US
★★★★★ 5
Not bad, good to business. Need more benefit.
Nice card, but less benefit than the personal one. so okay.
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Reviewed in the United States on May 22, 2026
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DON FRYER
Belleville, US
★★★★★ 5
really easy to use i will keep use it!
work really well very please
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Reviewed in the United States on June 11, 2026
R
Verified Purchase
Robert York
Pawtucket, US
★★★★★ 5
Indestructable fun chew toy
Style: Bone
Great industructable toy. Most toys are lucky to sleep through their first night. This one has survived for several weeks and he loves it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026
F
Verified Purchase
faith
Fort Morgan, US
★★★★★ 5
Great toy for aggressive chewers plus cleans my dog’s teeth!
Style: Bone
I didn’t realize when I wrote this review but do now that small dog treats can be put in the ridges in this toy. My dog loves trying to get the treats out. This is an additional bonus to this great toy! This is a durable dog toy with 2 squeakers which are very entertaining to my dog. He loves toys that squeak! The color is great & has not faded since I’ve had it. It has a nice bounce to it when I throw it when we are playing. My dog is an American Pit Bull & has chewed through a lot of dog toys in the past. Not this one! He is an aggressive chewer & this has lasted. I also like the feature of this being a toy in which toothpaste can be applied to clean his teeth. I use Vet’s Best Enzymatic Dog Toothpaste & he loves it! With the way the toy is designed it is very easy to apply the toothpaste & it will not drip from the toy. It stays on toy long enough for my dog to “brush” his teeth while he chews the toy. I am very happy with this dog toy. It was well worth what I paid. I highly recommend!
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Reviewed in the United States on August 2, 2024
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Verified Purchase
Linda Hamilton
Whiting, US
★★★★★ 4
Excellent durability but one safety hazard the squeakers comes out.
Style: Bone
Well made for chewing except the squeekers on each end can come out and choke the dog, my dog was chewing on the end of it, and the squeaker came out. I picked it up before he could swallow it. They are choking hazards. That’s the only part that was bad about the product. It’s very sturdy for my little puppy. He uses his mollars. He really gets down to business when he’s chewing 😂
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Reviewed in the United States on March 22, 2026

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