The TLD D4 26.1 CARBON HELMET MIPS in Stealth Black is a full-face mountain biking helmet with a visor, Mips protection, and bold white geometric graphics, shown from the side.

The TLD D4 26.1 Carbon Helmet MIPS in Stealth Black is a matte black full-face helmet for motocross or mountain biking, featuring a visor, Mips protection, and "Troy Lee Designs" branding on the visor and chin guard.

Rear view of the TLD D4 26.1 Carbon Helmet MIPS in Stealth Black, matte finish, ventilation slits, yellow MIPS sticker, and white signature at the base—perfect for mountain biking.

Troy Lee Designs D4 26.1 Carbon Helmet Mips size chart lists head circumference in cm and sizes (XS–XXL) for adults and kids, making it ideal for mountain biking. Compatible with Mips protection, Stealth Black model included.

Description

The Reigning King of Full-Face Helmets D4 reigns king atop downhill podiums and BMX events across the globe. Available in carbon, composite and polyacrylite. Details are what makes the D4 the most coveted full-face in mountain biking. Prioritising safety while balancing weight through premium construction and materials, D4 incorporates Mips®protection with an EPP chin bar and anatomical cheek pads with emergency release.

SPECIFICATIONS:

• Mips® C2 Rotational Impact Brain Protection System

• UD carbon fibre shell • Three shell sizes to more accurately fit a variety of head sizes and rider ages

• Anatomical "3D” contoured cheek pads with an emergency release system for EMS responders

• Removable snap-in, washable comfort liner with Coolmax® and Dri-lex® moisture-wicking materials

• Super light titanium D-rings

• 1000g

• CPSC 1203*, CE EN1078*, ASTM F1952-DH, ASTM 2032-BMX. *Varies by regional standards

TLD D4 26.1 CARBON HELMET MIPS / STEALTH BLACK

Name: TLD D4 26.1 CARBON HELMET MIPS / STEALTH BLACK
Brand: Troy Lee Designs
SKU: 141437015
Price: 780.0 USD
Availability: InStock

Brand: Troy Lee Designs SKU: Click to copy the SKU and show the pick location

$780.00 USD

Or 4 payments of $195.00 USD with

Colour - Stealth Black

Size - XL-XXL

The D4 (Carbon, Composite and Polyacrylite) comes in three shells, each covering two sizes. Pick the shell that covers your measurement.

Size	Head circumference	Notes
XS-S	53–56cm	XS 53–54 · S 55–56
M-L	57–59cm	M 57–58 · L 58–59
XL-XXL	60–63cm	XL 60–61 · XXL 62–63

TLD says: if you are between sizes, consider the larger size for a more relaxed fit. Spare cheek pads and a head liner are included to fine-tune the fit.

How to measure

Wrap a soft tape measure around the widest part of your head, about 2.5cm above your eyebrows and just above your ears. Keep it level and snug but not tight, and read the number in centimetres.

No tape measure? Use a piece of string or a shoelace, mark where it meets, then measure the string against a ruler.

Between two sizes? Most helmet brands recommend the larger size and using the thicker set of pads. A helmet should feel snug all round with no pressure points, and shouldn't rock when you shake your head.

Read the full buying guide