---
product_id: 452338642
title: "O'Neal Sierra Helmet, Black/Gray MD"
brand: "o'neal"
price: "฿19733"
currency: THB
in_stock: true
reviews_count: 13
category: "O'neal"
url: https://www.desertcart.co.th/products/452338642-oneal-sierra-helmet-black-gray-md
store_origin: TH
region: Thailand
---

# Integrated & height-adjustable face shield Vent holes for optimal airflow DOT & ECE certified safety O'Neal Sierra Helmet, Black/Gray MD

**Brand:** o'neal
**Price:** ฿19733
**Availability:** ✅ In Stock

## Summary

> 🛡️ Ride Bold, Ride Protected — The Sierra Helmet Means Business

## Quick Answers

- **What is this?** O'Neal Sierra Helmet, Black/Gray MD by o'neal
- **How much does it cost?** ฿19733 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/452338642-oneal-sierra-helmet-black-gray-md)

## 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, Every Ride:** Padded chin strap with Double-D safety lock ensures a snug, reliable fit on every adventure.
- • **Comfort Meets Durability:** Polycarbonate/ABS shell with moisture-wicking, removable liner keeps you cool and fresh.
- • **Customizable Shield Control:** Height-adjustable integrated face shield adapts to your ride and lighting conditions.
- • **Versatile for Every Terrain:** Designed for street, enduro, side-by-side, and adventure bikes—your all-in-one helmet solution.
- • **Certified Protection, No Compromise:** Meets rigorous DOT FMVSS 218 & ECE 22.05 standards for ultimate peace of mind.

## Overview

The O'Neal Sierra Helmet in Black/Gray combines advanced polycarbonate/ABS shell construction with DOT and ECE certified safety standards, featuring an integrated, height-adjustable face shield and ventilated comfort liner. Designed for diverse riding styles from street to off-road, it offers a secure Double-D chin strap and moisture-wicking padding, delivering professional-grade protection and comfort at an unbeatable value.

## Description

In 1970, Jim O'Neal began attending his races with some spare tires and parts to sell to local riders. Jim’s first big product was Preston Petty fenders. “Those Fenders were hot. Off Road racing was just getting serious and everyone needed the better parts, apparel and accessories to compete. It was then that Jim O’Neal Distributing Inc. was born. Features: Polycarbonate/ABS Shell construction - 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 FMVSS 218 and ECE 22.05 safety standards - Designed for Street, Enduro, Side by Side and Adventure Bike’s

Review: Great entry level helmet - Really nice helmet at price point! It’s comfortable, stylish with many features found in more expensive models
Review: Yes, you need a sun visor - In my opinion, this helmet hit a home run. I've only had it for a few weeks but the quality seems to far surpass the value. I like the silver/gray color scheme a lot and I love the sun visor. I do wish it had more vents since I live in the heat but it's fine. There is some wind noise but I think that's the nature of the beast. Sometimes there are sacrifices for such a low price but I just don't see it in this particular item. Update#1 As an addition, I am a tweener at 23" - between MD and LG - so I went with the LG. I got it, I wore it around the house and it felt snug; however, after many rides later, it does seem to have broken in to an ever so slightly, loose fit. It's possible a MD would have been a better choice. Update#2 I recently noticed that the screws to the visor were very loose. Get some blue loctite on those before you lose them. Update#3 After some time, the LG does cause unbearable crown pressure. It's mostly loose left to right. Update#4 I bought a MED and confirmed the outer shell and inner padding of both LG and MED are identical in size. They share the same shell and the difference lies in the EPS core. Unfortunately, the MED mostly caused forehead pressure and wasn't the solution to the LG. This is unfortunate dilemma of a tweener.

## Features

- Polycarbonate/ABS Shell construction
- Integrated face shield
- Height adjustable helmet shield
- Padded Chin Strap with Double-D safety lock
- Meets DOT FMVSS 218 and ECE 22.05 safety standards

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B095WC8433 |
| Best Sellers Rank | #14,489 in Automotive ( See Top 100 in Automotive ) #61 in Motorcycle & Powersports Helmets |
| Brand | O'NEAL |
| Brand Name | O'NEAL |
| Certificate Type | DOT |
| Color | Black/Gray |
| Compatible with Vehicle Type | off-road-motorcycles |
| Customer Reviews | 4.6 out of 5 stars 2,670 Reviews |
| Included Components | Full Face Helmet |
| Item Type Name | Sierra Helmet R |
| Item Weight | 120 Grams |
| Manufacturer | O'Neal |
| Manufacturer Part Number | 0818-703 |
| Material | Polycarbonate (PC) |
| Material Type | Polycarbonate (PC) |
| Model Name | Sierra R Helmet |
| Model Number | 0818-703 |
| Number of Items | 1 |
| Shape | Aerodynamic |
| Shell Type | Hard |
| Specification Met | DOT, ECE |
| Sport | Motorcycling |
| Sport Type | Motorcycling |
| Style Name | Black/Gray |
| Unit Count | 1.0 Count |
| Vehicle Service Type | off-road-motorcycles |
| Warranty Description | See Manufacturer |

## Product Details

- **Brand:** O'NEAL
- **Color:** Black/Gray
- **Item Weight:** 120 Grams
- **Material:** Polycarbonate (PC)
- **Vehicle Service Type:** off-road-motorcycles

## Images

![O'Neal Sierra Helmet, Black/Gray MD - Image 1](https://m.media-amazon.com/images/I/71wycCami0L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great entry level helmet
*by S***R on June 4, 2026*

Really nice helmet at price point! It’s comfortable, stylish with many features found in more expensive models

### ⭐⭐⭐⭐⭐ Yes, you need a sun visor
*by M***P on October 8, 2025*

In my opinion, this helmet hit a home run. I've only had it for a few weeks but the quality seems to far surpass the value. I like the silver/gray color scheme a lot and I love the sun visor. I do wish it had more vents since I live in the heat but it's fine. There is some wind noise but I think that's the nature of the beast. Sometimes there are sacrifices for such a low price but I just don't see it in this particular item. Update#1 As an addition, I am a tweener at 23" - between MD and LG - so I went with the LG. I got it, I wore it around the house and it felt snug; however, after many rides later, it does seem to have broken in to an ever so slightly, loose fit. It's possible a MD would have been a better choice. Update#2 I recently noticed that the screws to the visor were very loose. Get some blue loctite on those before you lose them. Update#3 After some time, the LG does cause unbearable crown pressure. It's mostly loose left to right. Update#4 I bought a MED and confirmed the outer shell and inner padding of both LG and MED are identical in size. They share the same shell and the difference lies in the EPS core. Unfortunately, the MED mostly caused forehead pressure and wasn't the solution to the LG. This is unfortunate dilemma of a tweener.

### ⭐⭐⭐⭐⭐ For the price, one great dual sport riding helmet
*by J***N on November 26, 2025*

Great helmet for the price. O'Neal dud a great job with the engineering aspects. Very comfortable, well padded, full face coverage keeps the wind off your face, much quieter on windy rides, sun protection visor for sunny days. Face protector visor easily retractable. Liked mine so I ordered one for my wife as well

## Frequently Bought Together

- O'Neal Sierra Helmet
- KEMIMOTO Tactical Gloves for Men, Touchscreen Motorcycle Gloves with Hard Shell & Palm Padding for Sports Motorcycle Cycling Tactical Airsoft Paintball Hunting Hiking Camping Climbing

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-07-05*