---
product_id: 215245204
title: "Smith Mainline Cycling Helmet – Downhill Adult Mountain Bike Helmet + Koroyd Coverage + MIPS Technology for Men & Women - Adjustable Visor"
brand: "smith"
price: "$836.27"
currency: USD
in_stock: true
category: "Smith"
url: https://www.desertcart.us/products/215245204-smith-mainline-cycling-helmet-downhill-adult-mountain-bike-helmet-koroyd
store_origin: US
region: United States of America
---

# MIPS multi-directional impact protection 21 fixed vents for airflow Koroyd energy-absorbing core Smith Mainline Cycling Helmet – Downhill Adult Mountain Bike Helmet + Koroyd Coverage + MIPS Technology for Men & Women - Adjustable Visor

**Brand:** smith
**Price:** $836.27
**Availability:** ✅ In Stock

## Summary

> 🚵‍♂️ Ride Bold, Ride Smart – The Smith Mainline Has Your Back!

## Quick Answers

- **What is this?** Smith Mainline Cycling Helmet – Downhill Adult Mountain Bike Helmet + Koroyd Coverage + MIPS Technology for Men & Women - Adjustable Visor by smith
- **How much does it cost?** $836.27 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/215245204-smith-mainline-cycling-helmet-downhill-adult-mountain-bike-helmet-koroyd)

## Best For

- smith enthusiasts

## Why This Product

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

## Key Features

- • **Custom Comfort Fit:** Multiple washable padding sets and an adjustable visor let you dial in your perfect fit and style.
- • **Stay Cool, Ride Clear:** 21 strategically placed vents and anti-odor lining keep you fresh and your goggles fog-free, no matter how intense.
- • **Downhill-Ready Confidence:** Certified for aggressive trail riding and enduro racing, so you can push limits without hesitation.
- • **Heritage Meets Innovation:** Smith’s legacy since 1965 means you’re riding with a brand trusted by outdoor adventurers worldwide.
- • **Next-Level Impact Protection:** Koroyd coverage combined with MIPS technology ensures lightweight yet superior safety on every ride.

## Overview

The Smith Mainline is a downhill-certified adult mountain bike helmet featuring Koroyd energy-absorbing material and MIPS technology for advanced impact protection. With 21 fixed vents and hybrid anti-odor lining, it ensures optimal ventilation and comfort. Adjustable visor and multiple padding sets provide a customizable fit. Designed for aggressive trail riders, it meets multiple safety standards including CPSC, CE EN 1078, and ASTM F1952.

## Description

desertcart.com : SMITH Mainline MTB Cycling Helmet – Downhill Certified Adult Enduro Mountain Bike Helmet with Koroyd + MIPS Technology – Lightweight Impact Protection for Men & Women – Matte Black, Medium : Sports & Outdoors

## Features

- Our Pinnacle, Downhill-Certified Helmet: Made for going big, going fast, or both, the Smith Mainline gives you the confidence to get aggressive on the trail, whether you're slaying the EWS in Whistler or suffering through the last stage of your local enduro race
- Your Protection at its Core: Our Mainline helmet features complete Koroyd coverage for lightweight, energy-absorbing & ventilated protection, MIPS Safety Protection System. Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older as well as CE EN 1078, NTA8776 E-Bike and ASTM F1952 Downhill
- Stay Cool & Eliminate Foggy Lenses: With 21 fixed vents for consistent airflow, hybrid X-Static/Ionic+ lining for sweat-activated odor control and lightweight, low-bulk single-layer webbing, you’ll stay cool and your glasses or goggles will stay clear
- Includes Multiple Padding Sets for a Comfortable Fit: Includes 3 washable cheek pad kits, 2 crown liners + 2 neck rolls to let you fine tune the fit; the visor adjusts into three positions
- Born on the Mountain, Built from Innovation: Smith is a performance eyewear and helmet brand for those inspired to pursue new and deeper connections with the outdoors; we’ve been outfitting consumers with the confidence to experience more since 1965

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B089CXGBGY |
| Additional Features | Lightweight |
| Age Range Description | Adult |
| Best Sellers Rank | #153,891 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #353 in Adult Bike Helmets |
| Brand Name | SMITH |
| Color | Matte Black |
| Customer Reviews | 4.7 4.7 out of 5 stars (301) |
| Global Trade Identification Number | 00716736216867 |
| Included Components | 1 item |
| Inner Material | Expanded Polystyrene |
| Item Type Name | bike-helmets |
| Item Weight | 3.2 Pounds |
| Manufacturer | Smith |
| Manufacturer Part Number | E007429RX5559 |
| Model Name | E007429RX |
| Model Number | MAINLINE |
| Outer Material | Polycarbonate (PC) |
| Product Style | hybrid |
| Recommended Uses For Product | Cycling |
| Size | Medium |
| UPC | 716736216867 |
| Unit Count | 1.0 Count |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** SMITH
- **Color:** Matte Black
- **Size:** Medium
- **Special Feature:** Lightweight

## Images

![Smith Mainline Cycling Helmet – Downhill Adult Mountain Bike Helmet + Koroyd Coverage + MIPS Technology for Men & Women - Adjustable Visor - Image 1](https://m.media-amazon.com/images/I/711azTnUpgL.jpg)

## Available Options

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

## Frequently Bought Together

- Smith Mainline Cycling Helmet – Downhill Adult Mountain Bike Helmet + Koroyd Coverage + MIPS Technology for Men & Women - Adjustable Visor
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**Shop now:** [https://www.desertcart.us/products/215245204-smith-mainline-cycling-helmet-downhill-adult-mountain-bike-helmet-koroyd](https://www.desertcart.us/products/215245204-smith-mainline-cycling-helmet-downhill-adult-mountain-bike-helmet-koroyd)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-28*