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Oneal Defender Solid MTB Helmet

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Features of Oneal Defender Solid

Product description of Oneal Defender Solid MTB Helmet

Description summary

Conquer any trail with the O´Neal Defender Solid MTB Helmet. Designed for all-mountain and enduro riders, this lightweight helmet boasts advanced double-inmold construction for superior impact protection and durability. Stay cool and focused with its optimized ventilation system, while the customizable fit and O´Neal Fidlock® magnetic buckle ensure secure, one-handed operation. Certified to EN1078 and CPSC standards, the Defender offers uncompromising safety and style with a premium matte finish

ONeal Defender Solid MTB Helmet

Attributes: Adult, No Technology, Synthetic

Unleash your full potential on the trails with the O´Neal Defender Solid MTB Helmet, the definitive choice for dedicated all-mountain and enduro riders. This helmet is the complete package, meticulously engineered to offer a superior blend of lightweight performance, exceptional ventilation, and uncompromising safety. Whether you´re grinding up a technical climb or charging through demanding descents, the Defender is your trusted partner, providing the confidence you need to push your limits. Its sleek, modern design with a premium matte finish ensures you look as good as you feel, making it a standout piece of equipment in any mountain biker´s arsenal.

Experience a new level of protection with the helmet´s advanced double-inmold construction. This state-of-the-art technology robustly fuses the impact-absorbing inner EPS layer with a durable polycarbonate outer shell. An additional second shell layer is strategically placed to protect the outer edges from daily wear and tear, significantly enhancing the helmet´s longevity and its ability to manage impacts. This lightweight yet incredibly strong design meets both EN1078 and CPSC safety standards, giving you certified peace of mind on every ride.

Comfort is paramount during long days on the bike, and the Defender excels with its optimized ventilation system. Generously sized ventilation openings work in harmony with deep internal air channels to create a constant, cooling airflow over your head. This system efficiently draws in cool air and expels hot, stale air, ensuring you remain comfortable and focused, even during the most intense efforts in warm weather.

Achieving a perfect, secure fit is effortless. The Defender features a comprehensive adjustment system that allows for precise customization. A user-friendly adjustment wheel at the rear controls both the height and width of the retention system, ensuring the helmet sits perfectly and securely on your head without creating pressure points. This personalized fit is critical for both comfort and safety, preventing the helmet from shifting during aggressive riding. A standout feature is the innovative O’Neal Fidlock® magnetic buckle, an engineering marvel that allows for quick, easy, and secure fastening and release with just one hand, even with gloves on. It provides maximum security while riding and eliminates the hassle of traditional clips.
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Features:
- Light, well-ventilated and stylish, the DEFENDER is our complete package for all-mountain and enduro. With double-inmold technology, robust for action on the trails.
- The lightweight Inmold technology fuses the inner EPS and outer shell together, with an additional second layer protecting the outer edges and improving impact absorption.
- The ventilation openings and internal ventilation channels ensure optimized air circulation.
- Easily adjustable helmet peak with locking points.
- O´Neal Fidlock® magnetic buckle engineered for easy, single-handed fastening and release, provides maximum security while riding.
- Perfectly adjustable seat thanks to height and width adjustment with adjustment wheel.
- Matte finish.
- Meets EN1078 and CPSC safety standard for bicycle Helmets.
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Specifications:
- Weight: 400g (±25g)
- Material: Outer Shell: 68% EPS, 32% Polycarbonate; Padding: 100% Polyurethane-Foam; Liner: 100% Polyester

EN1078 IMPORTANT NOTE This helmet has been built, tested and approved according to the European regulations ECE/ONU R22.05. TRADEINN is not responsible for the use that may be made of this helmet in other countries that are not subject to this European homologation ECE/ONU R22.05, discouraging the use of this in those countries.

Technical specifications of Oneal Defender Solid

  • Weight

    400g (±25g)

  • Padding

    100% Polyurethane-Foam

  • Closure system

    O´Neal Fidlock® Magnetic Buckle

  • Construction

    Composite

  • Certifications

    EN 1078, CPSC

  • Intended use

    MTB, Enduro, All-Mountain

  • Safety system

    Second Layer Protecting Outer Edges And Improving Impact Absorption

  • Ventilation / Breathability

    Ventilation Openings And Internal Ventilation Channels Ensure Optimized Air Circulation

  • Color

    Grey

  • Age

    Adult

Features of Oneal Defender Solid

Color Grey

Color

Grey

Age Adult

Age

Adult

Key differentiators

Certified to both EN1078 and CPSC bicycle helmet safety standards.

Comprehensive fit system with a rear adjustment wheel for both height and width.

Double-inmold construction with a second shell layer for enhanced impact absorption and durability.

Features the O'Neal Fidlock® magnetic buckle for quick, one-handed fastening and release.

Optimized ventilation with large openings and internal air channels for cooling.

Technology in Oneal Defender Solid MTB Helmet

Energy rating

Warnings

/ 5

1 Reviews

What our customers are saying about Oneal Defender Solid MTB Helmet

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Include AI Generated questions and answers

2026-07-10

Generated by AI and verified

Oneal Defender Solid MTB Helmet

What are the main safety features of the O'Neal Defender Solid MTB Helmet?

Answer of Generated by AI and verified

The O'Neal Defender Solid MTB Helmet is engineered for safety with an advanced double-inmold construction that fuses the impact-absorbing EPS inner layer with a durable polycarbonate outer shell. It is certified to meet both EN 1078 and CPSC safety standards, providing certified protection for all-mountain and enduro riding.

* Generated by AI based on customer and product data

2026-07-10

Generated by AI and verified

Oneal Defender Solid MTB Helmet

What materials are used to construct the O'Neal Defender helmet?

Answer of Generated by AI and verified

This helmet is constructed from a blend of 68% EPS (Expanded Polystyrene) for impact absorption and 32% Polycarbonate for the durable outer shell.

* Generated by AI based on customer and product data

2026-07-10

Generated by AI and verified

Oneal Defender Solid MTB Helmet

How much does the O'Neal Defender Solid MTB Helmet weigh?

Answer of Generated by AI and verified

The O'Neal Defender Solid MTB Helmet has a specified weight of 400g, with a tolerance of ±25g.

* Generated by AI based on customer and product data

2026-07-10

Generated by AI and verified

Oneal Defender Solid MTB Helmet

What type of mountain biking is the O'Neal Defender Solid helmet best for?

Answer of Generated by AI and verified

The O'Neal Defender Solid MTB Helmet is designed for all-mountain and enduro riders. Its combination of advanced protection, a lightweight build, and an optimized ventilation system makes it well-suited for both technical climbs and challenging descents.

* Generated by AI based on customer and product data

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Use cases

All-Mountain Biking 90% Fit

This helmet is specifically designed for All-Mountain riding, offering a balanced combination of protection and ventilation. The comprehensive adjustment system ensures a secure fit for varied terrain, while the optimized air circulation keeps you cool on long climbs.

Composite construction,Ventilation Openings And Internal Ventilation Channels,Comprehensive adjustment system,EN 1078 and CPSC certifications

Enduro Riding 90% Fit

Built for the demands of Enduro, this helmet features a double-inmold construction and a second protective layer for improved impact absorption on challenging descents. The O'Neal Fidlock® magnetic buckle allows for quick and easy fastening, even with gloves on.

double-inmold construction,Second Layer Protecting Outer Edges And Improving Impact Absorption,O´Neal Fidlock® Magnetic Buckle,Easily adjustable helmet peak

General Mountain Biking (MTB) 80% Fit

As a great all-rounder for general MTB and trail riding, this helmet provides reliable, certified protection in a comfortable package. The adjustable visor helps shield your eyes from sun and trail debris, making it a solid upgrade for regular riders.

Composite construction,Easily adjustable helmet peak,Comprehensive adjustment system,EN 1078 and CPSC certifications

Recreational Trail Riding 75% Fit

For riders enjoying local trails, this helmet offers dependable safety and comfort. The extensive ventilation system provides excellent airflow on warmer days, and the highly adjustable fit system ensures it stays comfortably in place throughout your ride.

Ventilation Openings And Internal Ventilation Channels,Comprehensive adjustment system with adjustment wheel,O´Neal Fidlock® Magnetic Buckle,Matte finish

Best for

Best for the Safety-Conscious Rider

This helmet meets EN 1078 and CPSC safety certifications and features a double-inmold construction with a second layer for improved impact absorption, offering solid protection for MTB, Enduro, and All-Mountain riding.

Ideal for All-Day Trail Sessions

With extensive ventilation openings, internal air channels for optimized circulation, and a comprehensive adjustment system for a secure fit, this helmet is built for sustained comfort and performance.

Great for Riders Seeking Smart Features

Featuring the O'Neal Fidlock® magnetic buckle for easy one-handed operation and a comprehensive adjustment system with a dial for height and width, this helmet integrates practical technology for a better ride.

A Solid Choice for Riders

The sleek matte finish and integrated, easily adjustable helmet peak provide a clean, modern aesthetic without compromising on core safety and performance features.

Benefits

FunctionalAchieve a Personalized Fit with Ease

This helmet features a comprehensive adjustment system, including an adjustment wheel that controls both height and width. This allows you to dial in a secure and comfortable fit tailored to your specific head shape for all-day riding.

FunctionalRide Confidently with Certified Protection

Engineered for safety, this helmet meets both EN 1078 and CPSC safety certifications. It features a double-inmold construction and a second layer designed to protect outer edges and improve impact absorption, giving you greater peace of mind on the trail.

FunctionalStay Cool on Demanding Rides

Designed with ventilation openings and internal ventilation channels, this helmet ensures optimized air circulation. This system helps keep you cool and comfortable, even during intense MTB, Enduro, or All-Mountain sessions.

FunctionalSecure Your Helmet Quickly with a Magnetic Buckle

Featuring the O'Neal Fidlock® magnetic buckle, this helmet allows for easy and secure one-handed fastening and release. This convenient closure system saves time and hassle, so you can get on the trail faster.

Ideal buyer profiles

The Safety-First Rider

This rider prioritizes protection above all else when tackling challenging trails. They look for helmets with proven safety features and certifications that provide peace of mind during Enduro or All-Mountain rides.

This helmet meets the EN 1078 and CPSC safety certifications. Its double-inmold construction, featuring a polycarbonate shell and EPS core, is enhanced by a second layer designed to improve impact absorption, directly addressing the need for robust protection.

The Rider

This individual is focused on maximizing their performance on every ride. They seek gear that is comfortable for long periods, offers excellent ventilation to prevent overheating, and provides a secure, non-distracting fit.

The Oneal Defender features optimized air circulation through its ventilation openings and internal channels, keeping the rider cool. The comprehensive adjustment system, with a wheel for height and width, ensures a stable and customized fit, allowing them to focus on the trail ahead.

The Tech-Users

This buyer appreciates gear with smart design features and modern conveniences. They are drawn to products that incorporate innovative technology to enhance usability and the overall riding experience.

With its O'Neal Fidlock® magnetic buckle for easy, one-handed operation and a double-inmold construction, this helmet offers modern technical features. The comprehensive adjustment system and easily adjustable peak also appeal to those who value well-engineered, user-friendly equipment.

Competitive features

When choosing an MTB helmet for all-mountain and enduro riding, key features like safety certifications, fit, and ventilation are crucial. We're comparing the Oneal Defender Solid MTB Helmet to other popular models like the Cube Stray Mips, Endura Hummvee Plus, and Uvex Stride to see how it stacks up in a competitive field.

Where it excels

The Oneal Defender Solid MTB Helmet features a convenient O'Neal Fidlock® magnetic buckle, designed for easy one-handed operation, a specific feature not mentioned for the other helmets. It is explicitly designed for all-mountain and enduro riding, offering a focused feature set for this discipline, including a double-inmold construction for durability and impact protection. This helmet holds both EN1078 and CPSC safety certifications, providing verified protection for adult riders.

Consider alternatives if...

While the Oneal Defender offers solid protection, competitors like the Cube Stray Mips MTB Helmet include the MIPS system, which is a specific technology designed to manage rotational forces during an impact. If MIPS is a priority, other options may be more suitable.

Verdict

The Oneal Defender Solid MTB Helmet is a strong contender for all-mountain and enduro riders, particularly for those who value the convenience of its Fidlock® magnetic buckle and its dual EN1078 and CPSC certifications. While it provides robust protection through its double-inmold construction, riders specifically seeking MIPS technology may want to evaluate alternatives like the Cube Stray Mips helmet. Given the similar price point across the board, the choice comes down to these specific feature preferences.

Specs comparison

Specs vs competitors

Material68% EPS, 32% PolycarbonatePlasticSynthetic-Polymer Compound-
VentilationVentilation Openings And Internal Ventilation Channels Ensure Optimized Air CirculationYesOptimized Airflow Channels-Maximized ventilation with 14 vents effective even at low speeds17 Aerodynamic Vents
Fit Systemcomprehensive adjustment system360-degree adjustable retention systemRear Dial Adjustment SystemRear Dial-Adjustment SystemAdjustableDial-Fit and Tuned Fit systems
Technology Featuresdouble-inmold constructionKoroydFull In-Mould TechnologyNo Technology360° Turbine TechnologyNo Technology
Aerodynamicsfalsetruefalsefalsefalsetrue
Intended UseMTB, Enduro, All-MountainAll-MountainAll Mountain, Enduro, TrailMTBMtbMTB, Enduro, All-Mountain
Closure SystemO´Neal Fidlock® Magnetic Bucklemagnetic buckle----
Adjustment SystemComprehensive adjustment system with adjustment wheel controlling height and widthprecision-adjustable retention systemRear Dial Adjustment System--Dial-Fit System and Tuned Fit System
Padding100% Polyurethane-FoamMoisture-wickingRemovable And Washable Comfort PaddingSoft, moisture-wicking padsMoisture Wicking, Breathable, And Washable Inner Liner-
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