The TLD 26.1 D4 AS Composite Helmet / Stealth Pumice is a beige and black full-face helmet with geometric graphics, visor, Troy Lee Designs branding, and Mips protection—perfect for downhill or BMX riding.

The Troy Lee Designs size chart shows head circumference in inches and cm, with color-coded sizing for BMX and downhill helmets like the TLD 26.1 D4 AS Composite Helmet / Stealth Pumice, including models with Mips protection.

The TLD 26.1 D4 AS Composite Helmet in Stealth Pumice is a beige full-face downhill helmet with black Troy Lee Designs logos, multiple air vents, and Mips protection, shown from above.

A beige TLD 26.1 D4 AS Composite Helmet / Stealth Pumice visor with black “Troy Lee Designs” logos on both sides, shown on a white background—compatible with BMX helmet models and the Mips protection system.

The TLD 26.1 D4 AS Composite Helmet in Stealth Pumice is a beige and black BMX helmet with an open face, angular graphics, visor, and advanced Mips protection for enhanced durability and safety.

The TLD 26.1 D4 AS Composite Helmet / Stealth Pumice is a white and black full-face downhill helmet with visor, Mips protection, and "Troy Lee Designs" branding, shown from a rear-side angle against a plain background.

The TLD 26.1 D4 AS Composite Helmet / Stealth Pumice is shown from the back, with black vents, a black lower section, and a yellow "Mips" sticker to indicate its Mips protection system.

The TLD 26.1 D4 AS Composite Helmet / Stealth Pumice is shown from the side, featuring a white full-face design with black geometric patterns, visor, ventilation, and Mips protection—perfect for BMX riders seeking safety and style.

Description

Always Evolving

DISCIPLINE: Downhill, BMX
Built with an aerospace shell design and materials, we were able to get the D4 Composite helmet to 1050 grams without sacrificing any strength. Mips® C2 protection system is used to add an additional layer of safety in the event of a fall. For comfort, the D4 Composite routes cooling air through a front air intake system that flows through the polymer center and power grid side mesh keeping your head cooler during the ride. X-static® and XT2® anti-microbial/anti-odor padding keep the inside of the helmet a much nicer place to be.

FEATURES
• Mips® C2 Rotational Impact Brain Protection System
• 20 high-flow intake and exhaust ports for maximum ventilation
• Added EPS and new headform shape for improved impact performance
• Full incremental sizing for greater range of fitment
• Strategically placed interior chinbar shock pads for comfort and durability
• Quick-release and contoured 3D cheek pads for emergency helmet removal
• Purpose-built internal cavities for audio integration
• Stainless steel chinstrap D-rings are light and strong
• Includes TLD drawstring helmet sock
• Exceeds bicycle certifications: CPSC 1203, CE EN 1078:2002+A1:2012 ASTM F1952-15, ASTM F2032-15, ASTM F2040-11

TLD 26.1 D4 AS Composite Helmet / Stealth Pumice

Name: TLD 26.1 D4 AS Composite Helmet / Stealth Pumice
Brand: Troy Lee Designs
SKU: 142437065
Price: 561.0 USD
Availability: OutOfStock

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

$561.00 USD

Or 4 payments of $140.25 USD with

Colour - -

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