Global Helmet Intelligence Platform

GMax · OF-77

GMax OF-77 Gloss White

GEVERIFIEERDE TECHNISCHE SPECIFICATIE Open Face DOT Polycarbonate 1267g
CAD ARCHITECTURE BLUEPRINT

Empirical Geometry Profile · Verified Laboratory Cataloging

Quick Facts at a Glance

Category Open gezicht
Certifications DOT
Measured Weight 1267 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
Rotational Protection Yes (Rotational Mitigation)
SHARP Impact Score Not tested by SHARP
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 open-face fit; may feel tight on larger head sizes due to fixed shell size.

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"

The Gmax OF-77 Gloss White is engineered for warm-weather riding with featherweight crown comfort, pairing 180-degree panoramic sightlines with certified cranial protection. Built around a High-Yield Impact-Resistant Polycarbonate / Lexan shell weighing a featherweight 1267g, its multi-density EPS matrix is aerodynamically sculpted to isolate cabin noise to ~98 dB while dissipating kinetic impact forces across DOT benchmarks. The interior features a plush, moisture-wicking crown liner shaped for Intermediate Oval head shapes, secured by track-proven Double D-Ring retention for effortless warm-weather riding.

Key Highlights:

Polycarbonaat buitenschaal 3D Max-Dry-systeem dat vocht 3x sneller afvoert Tussenliggende ovale vorm Verwijderbare en wasbare voering DOT-gecertificeerd

Rider Profile & Intended Use

Riding Style Commuter
Helmet Category Open gezicht
Internal Fit Shape Intermediate Oval
Real-time price tracking active across international retailers.

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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 OF-77 Gloss White is engineered as a high-integrity Open Face 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 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.

Schaalconstructie Polycarbonate Extern constructiemateriaal
Measured Weight 1267 g (2.79) Geschat gewicht bij maat M
Warranty 2 Years Dekkingsduur van de fabrikant
Primair gebruik Commuter Geoptimaliseerde rijoriëntatie

Safety & Certifications

Certificering DOT Gecertificeerde veiligheidsnorm
Rotational Protection Yes (Rotational Mitigation) Vermindert rotatie-impact
Noodontgrendeling Not specified Snelle verwijdering van wangkussens
Retentieband Double D-Ring Type sluiting van de kinband

Acoustics & Aerodynamics

Geluidsniveau 96 dB Gemeten windgeruis bij snelheid
Ventilatie 7/10 Beoordeling van de luchtstroomprestaties
In de windtunnel getest Not specified Geoptimaliseerde aerodynamica van de buitenschaal
Pinlock anticondens Niet inbegrepen Anticondens-inzetstuk voor vizier

Technology & Convenience

Integratie van communicatiesystemen Generic Speaker Cutouts Beschikbaarheid van uitsparing voor intercom
Geschikt voor brildragers Not specified Brillengleuven in de binnenvoering
Viziersysteem Not verified Geïntegreerd neerklapbaar zonnevizier
Uitneembare binnenvoering Not verified Wasbare voeringmodules

Regional Legality & Compliance

🇺🇸 US Street Legal
Required: DOT

Meets Federal Motor Vehicle Safety Standard 218 requirements.

🌐 CA Street Legal
Required: DOT

Accepted in most provinces under DOT compliance.

🇪🇺 EU Not Legal
Required: ECE 22.05/22.06

Lacks ECE certification required for road use in Europe.

🇦🇺 AU Not Legal
Required: AS/NZS 1698

Lacks required Australian Standard certification.

Regional Legality Guidance

US

Status: Street Legal

Required: DOT

Meets Federal Motor Vehicle Safety Standard 218 requirements.

CA

Status: Street Legal

Required: DOT

Accepted in most provinces under DOT compliance.

EU

Status: Not Legal

Required: ECE 22.05/22.06

Lacks ECE certification required for road use in Europe.

AU

Status: Not Legal

Required: AS/NZS 1698

Lacks required Australian Standard certification.

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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
DOT Homologation Record
Verification Status
✓ Verified Data
Last Audit Date
2026-09-19