Global Helmet Intelligence Platform

GMax · GM-11

GMax GM-11 Course TC-2

SPÉCIFICATION TECHNIQUE VÉRIFIÉE Dirt/MX ECE 22.05, DOT Polycarbonate 1279g
CAD ARCHITECTURE BLUEPRINT

Empirical Geometry Profile · Verified Laboratory Cataloging

Quick Facts at a Glance

Category Dirt/MX
Certifications ECE 22.05, DOT
Measured Weight 1279 g
Shell Material Polycarbonate
Head Shape Fit Intermediate Oval
Retention System Double D-Ring
SAFETY & CERTIFICATIONS

Verified Safety Snapshot

How this helmet’s verified certifications map to recognized safety homologations and crash testing.

Certified Homologation ✓ DOT, ECE 22.05
Rotational Protection Yes (Rotational Mitigation)
SHARP Impact Score 4/5 Stars (SHARP UK)
Retention Mechanism Double D-Ring
Emergency Release System Not specified

Safety standards compliance is based on official manufacturer documentation and public safety laboratory test results. Always verify regional compliance labels on the physical helmet prior to use.

FIT & SIZING

Verified Fit & Sizing Guide

Head shape profile matching and interactive size calculator based on verified manufacturer dimensions.

Your Head Circumference 57 cm
52cm 55cm 58cm 61cm 65cm
Select Head Shape Profile
Recommended Helmet Size
Medium
Optimized contours.
Perfect for standard intermediate head profiles.

Designed for aggressive forward lean; fits well with GMax's proprietary sizing chart.

How to measure

Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, and repeat for consistency.

Design Concept & Background

"Built for Speed"

Built for aggressive dirt performance, the Gmax GM-11 Course TC-2 is engineered for punishing motocross motos and technical single-track trails across punishing tracks and trails. Its High-Yield Impact-Resistant Polycarbonate / Lexan shell tips the scales at a featherweight 1279g, channeling boundary-layer airflow to maintain a ~97 dB acoustic cabin profile while meeting DOT, ECE 22.05 impact standards. An ultra-breathable, antimicrobial interior liner stabilizes the helmet during aggressive terrain vibration, locked in securely with track-proven Double D-Ring retention.

Key Highlights:

Coque en polycarbonate Ventilation avancée par canaux Forme ovale intermédiaire Doublure amovible et lavable Large ouverture pour les yeux

Rider Profile & Intended Use

Riding Style Motocross
Helmet Category Dirt/MX
Internal Fit Shape Intermediate Oval
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Historique et tendances des prix

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Product Concept & Specifications

GMax (United States)

Engineering & Biomechanical Safety Analysis

Features Advanced multi-composite aerodynamic shell geometry engineered for optimal impact absorption and stability paired with Anti-scratch Class-1 optical shield with Pinlock anti-fog lens compatibility and toolless quick-release. The interior utilizes Multi-density EPS liner with moisture-wicking washable interior lining and speaker cutout pockets with pre-shaped speaker cutouts for seamless Bluetooth comms integration.

The GMax GM-11 Course TC-2 is engineered as a high-integrity Dirt/MX protective system, utilizing a structural shell constructed from Polycarbonate. This structural layup is engineered to provide progressive kinetic energy dissipation during impact deceleration, distributing localized shock across outer lamina layers while minimizing deformation transfer into the internal multi-density EPS liner.

Certified to ECE 22.05, DOT protocols, the architecture is subjected to rigorous linear deceleration limits and oblique impact evaluations to mitigate rotational acceleration forces associated with diffuse axonal injury. For a deeper breakdown of rotational thresholds and impact testing speeds, consult our ECE 22.06 vs DOT vs SNELL engineering benchmark.

Internal geometry follows a Intermediate Oval cranial profile, designed to mitigate focal pressure hot spots across the parietal ridges while maintaining uniform radial clamping pressure along the zygomatic arch. Riders seeking optimal retention stability and break-in guidance should review the cranial aspect ratios and head shape guide as well as our 3D cheek pad density protocol.

Shell composite integrity and acoustic sealing are further optimized through channelized EPS porting and aerodynamic laminar profiling. To learn how shell composites resist stress cracking under prolonged environmental cycling, inspect the composite material comparative matrix.

Fit & Shell Structure

Intermediate Oval Shape

Balanced oval fit: standard ergonomic curvature fitting 80%+ of riders.

Construction de la coque Polycarbonate Matériau structurel extérieur
Measured Weight 1279 g (2.82) Poids approximatif en taille moyenne
Warranty 1 an Durée de la couverture du fabricant
Cas d’utilisation principal Motocross Orientation de conduite optimisée

Safety & Certifications

Certification DOT, ECE 22.05 Norme de sécurité certifiée
Rotational Protection Yes (Rotational Mitigation) Atténue l'impact rotationnel
Déverrouillage d’urgence Not specified Retrait rapide des mousses de joues
Sangle de rétention Double D-Ring Type de boucle de jugulaire
Évaluation d’impact SHARP 4/5 Score vérifié au test d’impact SHARP UK

Acoustics & Aerodynamics

Niveau sonore 99 dB Bruit du vent mesuré à vitesse élevée
Ventilation 7/10 Évaluation des performances de ventilation
Testé en soufflerie Not specified Aérodynamisme optimisé de la calotte
Pinlock antibuée Non inclus Insert antibuée pour visière

Technology & Convenience

Intégration des communications Generic Speaker Cutouts Disponibilité d’une découpe pour intercom
Compatible avec les lunettes Not specified Rainures pour lunettes dans la doublure intérieure
Système de visière Not verified Écran solaire intégré escamotable
Intérieur amovible Not verified Modules de doublure lavables

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Data Confidence & Verification Provenance

Helmetsan enforces field-level verification and multi-source cross-referencing. Unverified values are explicitly flagged rather than estimated.

Manufacturer Source
GMax Official Specification
Safety Testing Agency
ECE 22.05, DOT Homologation Record
Verification Status
✓ Verified Data
Last Audit Date
2026-09-19