---
product_id: 46248470
title: "O'Neal Sierra Helmet, Flat Black LG"
brand: "o'neal"
price: "฿26101"
currency: THB
in_stock: true
category: "O'neal"
url: https://www.desertcart.co.th/products/46248470-oneal-sierra-helmet-flat-black-lg
store_origin: TH
region: Thailand
---

# 12 Vent holes for superior airflow Lightweight 1590g for all-day comfort ABS Shell for ultimate impact resistance O'Neal Sierra Helmet, Flat Black LG

**Brand:** o'neal
**Price:** ฿26101
**Availability:** ✅ In Stock

## Summary

> 🏍️ Ride Bold, Ride Protected – The Sierra Means Business

## Quick Answers

- **What is this?** O'Neal Sierra Helmet, Flat Black LG by o'neal
- **How much does it cost?** ฿26101 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/46248470-oneal-sierra-helmet-flat-black-lg)

## Best For

- o'neal enthusiasts

## Why This Product

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

## Key Features

- • **Secure Fit:** Padded chin strap with double-D safety lock ensures a snug, reliable hold
- • **Goggle Ready:** Side traction pads keep your goggles locked in place, no slip, no hassle
- • **All-Day Comfort:** Moisture-wicking, removable liner keeps you cool and fresh mile after mile
- • **Integrated Shield:** Height-adjustable face shield for seamless eye protection and style
- • **Race-Proven Safety:** DOT & ECE 22.05 certified protection you can trust every ride

## Overview

The O'Neal Sierra Helmet in Flat Black combines a durable ABS shell with a lightweight 1590g design, featuring 12 ventilation ports and a moisture-wicking, removable liner for premium comfort. Certified to DOT and ECE 22.05 standards, it includes an integrated, height-adjustable face shield and a secure double-D chin strap, making it the perfect choice for street, enduro, and adventure riders seeking reliable protection and style.

## Description

O'NEAL produces motorcycle and cycle gear, parts, apparel and accessories that absolutely offer the best in comfort, quality and protection every time you ride. Security, quality and protection you can trust after nearly 40 years of racing. Features: Shell IIS constructed with ABS - Weight: 1590g ( 50g) - Moisture wicking, removable/washable air channeled comfort liner- Vent holes for optimal ventilation - Integrated face shield- Height adjustable helmet shield - Padded Chin Strap with Double-D safety lock - Meets DOT and ECE 22.05 safety standards - Designed for Street, Enduro, Side by Side and Adventure Bike's- Replacement parts available.

## Features

- Shell is constructed with ABS
- Weight: 1590G ( 50G)
- Moisture wicking, removable/washable air channeled comfort liner
- Integrated face shield
- Padded chin strap with double-d safety lock. Side goggle traction pad keeps goggle strap securely in place

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01K9GN6C8 |
| Best Sellers Rank | #13,096 in Automotive ( See Top 100 in Automotive ) #60 in Motorcycle & Powersports Helmets |
| Brand | O'NEAL |
| Brand Name | O'NEAL |
| Closure Type | Hook & Loop |
| Color | Flat Black |
| Compatible with Vehicle Type | ATV, PWC, off-road-motorcycles, street-cruiser-motorcycles, street-touring-motorcycles |
| Customer Reviews | 4.6 out of 5 stars 2,675 Reviews |
| Global Trade Identification Number | 04046068487991 |
| Included Components | helmet |
| Item Type Name | Sierra Helmet R |
| Item Weight | 3.5 Pounds |
| Manufacturer | O'Neal |
| Manufacturer Part Number | 0817-504 |
| Material | Polycarbonate (PC) |
| Material Type | Polycarbonate (PC) |
| Model Name | Sierra R Helmet |
| Model Number | 0817-504 |
| Number Of Vents | 12 |
| Number of Items | 1 |
| Shape | Aerodynamic |
| Shell Type | Hard |
| Specification Met | DOT FMVSS 218 |
| Sport | Motorcycling |
| Sport Type | Motorcycling |
| Style Name | Full-face-helmet-style |
| Unit Count | 1.0 Count |
| Vehicle Service Type | ATV, PWC, off-road-motorcycles, street-cruiser-motorcycles, street-touring-motorcycles |
| Warranty Description | See Manufacturer |

## Product Details

- **Brand:** O'NEAL
- **Color:** Flat Black
- **Item Weight:** 3.5 Pounds
- **Material:** Polycarbonate (PC)
- **Vehicle Service Type:** ATV, PWC, off-road-motorcycles, street-cruiser-motorcycles, street-touring-motorcycles

## Images

![O'Neal Sierra Helmet, Flat Black LG - Image 1](https://m.media-amazon.com/images/I/817dW7TVNlL.jpg)
![O'Neal Sierra Helmet, Flat Black LG - Image 2](https://m.media-amazon.com/images/I/81GPlMFuOrL.jpg)
![O'Neal Sierra Helmet, Flat Black LG - Image 3](https://m.media-amazon.com/images/I/71fV50qgO-L.jpg)
![O'Neal Sierra Helmet, Flat Black LG - Image 4](https://m.media-amazon.com/images/I/81oNndG5dGL.jpg)

## Available Options

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

## Questions & Answers

**Q: Are these good for use with glasses? Enough air that my glasses won’t fog up ? And will the shield fog up itself?**
A: I don’t wear glasses but there seems to be enough room.  I have not had any issues with the shield fogging up.  There seems to be enough air flow through the front vents

**Q: How do i know if i order i will not get a left over year of manufacture?  what year is printed in these helmets?**
A: You get a helmet that looks exactly like the one you order. I don’t know what year it was made. But you don’t get a different helmet. Like a previous looking model. You get what’s pictured. It’s not like a car.

**Q: does the visor protect you from UV?**
A: The description says yes

**Q: Is this helmet super loud on the highway?**
A: Yes, it is significantly louder than all of my other helmets. I usually wear a good set of ear plugs with this one.

## Frequently Bought Together

- O'Neal Sierra Helmet
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- O'NEAL Element Dirt Bike Boots

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**Shop now:** [https://www.desertcart.co.th/products/46248470-oneal-sierra-helmet-flat-black-lg](https://www.desertcart.co.th/products/46248470-oneal-sierra-helmet-flat-black-lg)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-07-15*