---
product_id: 448054648
title: "Troy Lee Designs D4 Carbon Full-Face Mountain Bike Helmet. Max Ventilation Lightweight MIPS EPP EPS Racing Downhill DH BMX MTB - Adult Men Women Youth - Lines"
brand: "tld"
price: "$1294.53"
currency: USD
in_stock: true
reviews_count: 5
url: https://www.desertcart.us/products/448054648-troy-lee-designs-d4-carbon-full-face-mountain-bike-helmet
store_origin: US
region: United States of America
---

# 1000 grams lightweight 24 ventilation ports Carbon fiber shell Troy Lee Designs D4 Carbon Full-Face Mountain Bike Helmet. Max Ventilation Lightweight MIPS EPP EPS Racing Downhill DH BMX MTB - Adult Men Women Youth - Lines

**Brand:** tld
**Price:** $1294.53
**Availability:** ✅ In Stock

## Summary

> Ride with Confidence! 🏁

## Quick Answers

- **What is this?** Troy Lee Designs D4 Carbon Full-Face Mountain Bike Helmet. Max Ventilation Lightweight MIPS EPP EPS Racing Downhill DH BMX MTB - Adult Men Women Youth - Lines by tld
- **How much does it cost?** $1294.53 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/448054648-troy-lee-designs-d4-carbon-full-face-mountain-bike-helmet)

## Best For

- tld enthusiasts

## Why This Product

- Trusted tld brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Breathe Easy:** Experience ultimate airflow with 24 strategically placed vents for maximum ventilation.
- • **Tailored Fit:** Available in 6 sizes with anatomical 3D cheek pads for a personalized and comfortable fit.
- • **Convenient Care:** Enjoy a removable, washable Coolmax-Dri-lex liner for easy maintenance and freshness.
- • **Racing Heritage:** Join the legacy of Troy Lee Designs, trusted by the world's fastest racers for over 40 years.
- • **Unmatched Protection:** Engineered with a carbon fiber shell and EPP collarbone impact system for superior safety.

## Overview

The Troy Lee Designs D4 Carbon Full-Face Mountain Bike Helmet combines cutting-edge safety features with exceptional comfort and ventilation. Weighing only 1000 grams, this helmet is designed for serious riders, offering a carbon fiber shell, a comprehensive ventilation system, and a customizable fit. With a legacy of over 40 years in racing, this helmet is a must-have for anyone serious about downhill biking.

## Description

TLD's Daytona, D2 and D3 series of helmets redefined the marriage between technology, safety and artistic design. The new Troy Lee Designs D4 is changing the game again. Using carbon fiber reinforcements in the shell of the new TLD D4 Carbon helmet has helped pare down the weight of the full-face helmet by almost 50 grams without sacrificing strength. Despite the reduction in weight, we were able to strategically add EPS to increase strength and durability. Integrated MIPS System designed to reduce rotational motion transferred to the brain from angled impacts to the head. The new TLD D4's package is rounded out with lightweight titanium D-rings, collarbone suspension system and quick release XT2 3D cheek pads and X-Static washable liner. Not intended for use with motorized vehicles.

## Features

- COVERAGE: Carbon fiber shell, EPP Collarbone impact system, chinbar shock pads. 1000 grams
- VENTILATION: 24 vents- 10 front intake ports, 5 overhead channeling intake vents, 7 rear exhaust ports
- COMFORT & FIT: 3 Shell sizes, 3 EPS sizes, 6 total sizes XS-XXL. Anatomical, quick release "3D” cheek pads
- CONVENIENCE: Removable, washable Coolmax-Dri-lex comfort liner. Super light titanium D-rings.
- Troy Lee Designs: 40 years of racing for the World's Fastest Racers. Corona, California

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Age Range | Adult |
| Color | Lines Black / Gray |
| Size | L |
| Material Composition | Expanded Polystyrene |
| Height | 13 inches |
| Length | 16 inches |
| Weight | 4.7 Pounds |
| Width | 12 inches |
| Shape | Intermediate Oval |
| Material Type | Carbon Fiber |
| Number of Items | 1 |
| Outer Material | Carbon Fiber |
| Features | Lightweight |
| Sport | Cycling |
| Batteries Included? | No |
| Brand | TLD |
| Department | unisex-adult |
| Manufacturer | Troy Lee Designs |
| Item model number | Troy Lee Designs |
| Product Dimensions | 40.64 x 30.48 x 33.02 cm; 50 g |
| ASIN | B09RJ2M39N |

## Images

![Troy Lee Designs D4 Carbon Full-Face Mountain Bike Helmet. Max Ventilation Lightweight MIPS EPP EPS Racing Downhill DH BMX MTB - Adult Men Women Youth - Lines - Image 1](https://m.media-amazon.com/images/I/61FnHrj05iL.jpg)
![Troy Lee Designs D4 Carbon Full-Face Mountain Bike Helmet. Max Ventilation Lightweight MIPS EPP EPS Racing Downhill DH BMX MTB - Adult Men Women Youth - Lines - Image 2](https://m.media-amazon.com/images/I/61KCnbFb0fL.jpg)
![Troy Lee Designs D4 Carbon Full-Face Mountain Bike Helmet. Max Ventilation Lightweight MIPS EPP EPS Racing Downhill DH BMX MTB - Adult Men Women Youth - Lines - Image 3](https://m.media-amazon.com/images/I/61kT0EkdMgL.jpg)
![Troy Lee Designs D4 Carbon Full-Face Mountain Bike Helmet. Max Ventilation Lightweight MIPS EPP EPS Racing Downhill DH BMX MTB - Adult Men Women Youth - Lines - Image 4](https://m.media-amazon.com/images/I/61WssHC+rjL.jpg)
![Troy Lee Designs D4 Carbon Full-Face Mountain Bike Helmet. Max Ventilation Lightweight MIPS EPP EPS Racing Downhill DH BMX MTB - Adult Men Women Youth - Lines - Image 5](https://m.media-amazon.com/images/I/61SywqcVeWL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Great TLD quality
  

*by B***D on Reviewed in the United States on 24 October 2023*

Super light weight, more comfortable than my old D3 carbon, MIPS is a plus. I got an unbelievable price from seller but my helmet bag didn't come with the extra visor that all my other TLD lids came with. Not a huge deal, but a bummer. A few little blemishes but I paid 50% less than MSRP.

### ⭐⭐⭐⭐⭐ 







  
  
    What is your brain worth to you?
  

*by D***R on Reviewed in the United States on 6 August 2022*

I bought a D3 helmet and to be honest it was just too heavy for me because I have neck issues, so I spent the long dollar and bought the D4 Carbon Full Face and though it's pricey, you get what you pay for. This helmet weighs next to nothing and it's comfortable and breathes nicely through the vents. I was hesitant because of the cost, but I'm really glad I bit the bullet and got the helmet.

### ⭐⭐⭐⭐⭐ 







  
  
    Great helmet super light
  

*by S***Y on Reviewed in the United States on 22 July 2023*

Most comfortable helmet I've ever owned.Screams quality. Also it feels very very secure and it's light ans ventilated well

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-01-29*