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Troy Lee DesignsD3 Carbon MIPS Helmet

Item # TLD00PI

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Item # TLD00PI

Big lid for big lines.

Troy Lee Designs' D3 Carbon MIPS Helmet tucks industry-leading tech into a package that could easily pass as custom-made fare. It replaces standard adjustment dials with a highly adjustable incremental sizing system that all but guarantees a comfortable fit for any head shape. The D3 Carbon MIPS steps up the hat factor with the inclusion of Multi-Directional Impact Protection System (MIPS), a design that diffuses rotational energy caused by certain crashes and oblique impacts.

The outline of the D3 is the same as the old D2, but TLD played with the shape just a bit to improve its fit and feel. There's more EPS foam in the frontal areas, and the new 3D cheek pads are contoured to fit around your jaw and face for a more secure ride. TLD also redesigned the visor and front trim, giving them smoother edges for a better look.

The D3's shell is made from a carbon composite material that's incredibly strong and surprisingly light, and it's lined with dual-density shock pads that help absorb smaller impacts. Its removable, washable liner incorporates Coolmax and Dri-Lex technologies, which wick moisture, cool your dome, and fight odor. A host of 20 vents pulls air across your head and forces it out the back for efficient cooling, the adjustable visor is held in place with titanium hardware (and can be swapped out for the included second option), and a corrosion-resistant D-ring fastener cinches the D3 around your chin to keep it from bouncing off when things get a little rowdier than planned.

  • A DH helmet ready for big sends and hard crashes
  • Light, strong carbon fiber shell is race-ready
  • MIPS helps diffuse the rotational energy of certain impacts
  • EPS foam and shock pads absorb direct hits
  • 20 vents keep your dome cool on warm days
  • Highly adjustable sizing system allows a customizable fit
  • Aesthetics call for aggressive rides and big lines
Tech SpecsSize
Tech Specs
Shell Material
carbon composite
Impact Foam
20 vents
Fit Adjustment
incremental sizing
yes, adjustable (extra visor included)
Full Face
CPSC 1203, CE EN 1078, ASTM F1952-15, ASTM F2032-15, ASTM F2040-11
Recommended Use
mountain bike, downhill
Manufacturer Warranty
1 year

Troy Lee Designs

A1, A2
Head Circumference

19 - 20.9in

(48 - 53cm)

19.8 - 21.4in

(50 - 54cm)

21.3 - 22in

(54 - 56cm)

22.4 - 23.2in

(57 - 59cm)

22.6 - 24.8in

(60 - 62cm)

Hat Size 6 - 6 5/8 6 1/4 - 6 3/4 6 3/4 - 7 7 1/8 - 7 3/8 7 1/2 - 7 7/8
Head Circumference

20.5 - 20.9in

(52 - 53cm)

21.3 - 21.7in

(54 - 55cm)

22 - 22.4in

(56 - 57cm)

22.8 - 23.2in

(58 - 59cm)

23.6 - 24.4in

(60 - 62cm)

24.8 - 25.6in

(63 - 65cm)

Hat Size 6 1/2 - 6 5/8 6 3/4 - 6 7/8 7 - 7 1/8 7 1/4 - 7 3/8 7 1/2 - 7 3/4 7 7/8 - 8 1/8
 XS / SM / LXL / XXL
Head Circumference

21.3 - 22in

(54 - 56cm)

22.4 - 23.2in

(57 - 59cm)

22.6 - 24.8in

(60 - 62cm)

Hat Size 6 3/4 - 7 7 1/8 - 7 3/8 7 1/2 - 7 7/8
How to Measure:
With a tape measure, measure the widest point of your head, approximately 1 inch above your eyebrows.

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The Benchmark

  • Familiarity: I've put it through the wringer

This is the ultimate helmet. The fit is superb and it’s very light—doesn’t strain my head after wearing it for an extended period. The level of craftsmanship in the carbon and design is second to none.

Number 1

  • Familiarity: I've used it once or twice and have initial impressions

I have been on the search for finding a new DH helmet for this summer. And the Troy Lee is definitely the best I found. Super light, protective and looks killer. Stocked to use it once the bike parks open.

The Best

  • Familiarity: I've put it through the wringer

The D3 was almost perfect before, and is now even safer with MIPS technology. This fullface is the perfect blend of style, weight, and fit. Compared to other helmets on the market, the D3 is less bulky and seems to fit just about any moto goggle out there. I would highly recommend this helmet to anyone looking for a high end fullface.

Excellent fit

  • Familiarity: I've used it several times

Great fit and now with MIPS. Very comfortable and light for a full face.

Safe Just Got Safer

  • Familiarity: I've put it through the wringer
  • Fit: True to size

The D3's proven track record just got even safer with the addition of the Multi-directional Impact Protection System or MIPS for short. While I haven't put the system to the test, it's said to reduce the chances of concussions under rotational impacts. It's good piece of mind to know that the D3 now includes this technology. Having met Troy Lee and his strive for creating the safest helmets for not only his employees, racers, but even his family, I feel at ease that wearing this lid will provide some of the best protection I can buy when the going gets rough.

Aside from the safety aspect of the helmet, the D3 has distinctly unique styling and a smaller volume than other full face helmets. Additionally, the inside shape of the brow on the D3 has been reconfigured a bit to fit better. With this new shape, I was able to drop from a size XL D3 to a Large.

Safe Just Got Safer