---
product_id: 46248470
title: "Sierra Helmet, Flat Black LG"
brand: "o'neal"
price: "€ 515.18"
currency: EUR
in_stock: true
category: "O'neal"
url: https://www.desertcart.fi/products/46248470-sierra-helmet-flat-black-lg
store_origin: FI
region: Finland
---

# 12 vents for superior airflow & cooling Double-D safety lock for secure fit ABS shell for ultimate impact resistance Sierra Helmet, Flat Black LG

**Brand:** o'neal
**Price:** € 515.18
**Availability:** ✅ In Stock

## Summary

> 🖤 Ride Bold, Ride Protected — The O'Neal Sierra Helmets Own the Road

## Quick Answers

- **What is this?** Sierra Helmet, Flat Black LG by o'neal
- **How much does it cost?** € 515.18 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/46248470-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

- • **Seamless Vision:** Integrated, height-adjustable face shield for clear, hassle-free eye protection
- • **Secure & Stable:** Padded chin strap with double-D safety lock plus side goggle traction pad for zero slip
- • **Stay Cool & Fresh:** Moisture-wicking, removable, washable liner keeps you comfortable all ride long
- • **Ride with Confidence:** DOT & ECE 22.05 certified protection meets top safety standards
- • **Versatile Adventure Ready:** Designed for street, enduro, side-by-side & adventure bikes—one helmet, endless journeys

## Overview

The O'Neal Sierra Helmet in Flat Black combines a durable ABS shell with advanced ventilation and a moisture-wicking comfort liner, delivering certified DOT and ECE 22.05 safety. Featuring an integrated adjustable face shield and a secure double-D chin strap, it’s engineered for diverse riding styles from street to off-road, ensuring protection and comfort for every adventure.

## 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
- Helmet runs small if between sizes order larger size
- 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 | #18,406 in Automotive ( See Top 100 in Automotive ) #72 in Motorcycle & Powersports Helmets |
| Brand Name | O'NEAL |
| Certificate Type | DOT |
| Closure Type | Hook & Loop |
| Color | Flat Black |
| Compatible with Vehicle Type | ATV, PWC, off-road-motorcycles, street-cruiser-motorcycles, street-touring-motorcycles |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,690) |
| Finish Type | Glossy |
| 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 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 | FMVSS 218 |
| Sport Type | Motorcycling |
| Style Name | Full-face-helmet-style |
| Unit Count | 1 Count |
| 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

![Sierra Helmet, Flat Black LG - Image 1](https://m.media-amazon.com/images/I/817dW7TVNlL.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
- Seibertron Unisex BMX MX ATV MTB Racing Mountain Bike Bicycle Cycling Off-Road/Dirt Bike Gloves Road Racing Motorcycle Motocross Sports Gloves Touch Recognition Full Finger Glove
- O'NEAL Element Dirt Bike Boots

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

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-10-09*