GMax · GM-11S · GMax GM-11S
GMax GM-11S Urban Grey
Quick Facts at a Glance
Verified Safety Snapshot
How this helmet’s verified certifications map to recognized safety homologations and crash testing.
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.
Verified Fit & Sizing Guide
Head shape profile matching and interactive size calculator based on verified manufacturer dimensions.
Urban Grey colorway; designed for dirt/MX use with a focus on ventilation and impact protection; fits most head shapes but may feel tight for users with larger occipital lobes due to the aggressive MX profile.
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
""
GMax GM-11S Urban Grey is a high-performance Dirt/MX helmet engineered by GMax to meet high standards of safety and comfort. Inspect its detailed design background and specifications below.
Rider Profile & Intended Use
Where to buy
-
Amazon (US)
USD 158.95 View Deal →
Price History & Trends
ℹ️ Helmetsan is an independent motorcycle safety & decision engine. When you check prices or purchase via retailer links, Helmetsan may earn an affiliate commission at no additional cost to you.
Product Concept & Specifications
GMax (United States)Engineering & Technical Analysis
Multi-density EPS air channels direct airflow across the crown. Double-lipped shield gaskets maintain cabin sound levels around 94.5 dB at 100 km/h.
Fit & Shell Structure
Intermediate Oval Shape
Balanced oval fit: standard ergonomic curvature fitting 80%+ of riders.
Safety & Certifications
Acoustics & Aerodynamics
Technology & Convenience
Regional Legality & Compliance
Meets Federal Motor Vehicle Safety Standard 218 requirements.
Accepted for use in most provinces under DOT compliance.
Lacks ECE certification required for public road use in European countries.
Regional Legality Guidance
Interactive Size & Fit Finder
Urban Grey colorway; designed for dirt/MX use with a focus on ventilation and impact protection; fits most head shapes but may feel tight for users with larger occipital lobes due to the aggressive MX profile.
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.
Available Colors & Graphics
View on retailers
This helmet is linked to product pages on the following retailers. Links can be used for affiliate and as a source for data and images.
Compare & buy
Add this helmet to the comparison tool to see it side by side with others, or check current offers from trusted retailers.
User Reviews
Be the first to share your riding experience with this helmet.
Share your experience
No reviews yet. Be the first to share your experience with this helmet!
More from GMax
GMax GM-11
GMax OF-77
GMax GM-11S
GMax MD-01S
GMax FF-49
GMax AT-21S
Data Confidence & Verification Provenance
Helmetsan enforces field-level verification and multi-source cross-referencing. Unverified values are explicitly flagged rather than estimated.