Alpinestars · SM5
Alpinestars SM5 Course Blue
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.
Alpinestars SM5 is a motocross/dirt helmet designed for off-road use; it does not feature integrated speakers, HUD compatibility, or specific road-legal homologation standards like ECE 22.06. Designed for Intermediate Oval head shape.
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
"Ride Safe"
Domina la pista de tierra con el Alpinestars SM-5 Course en un llamativo color azul. Diseñado para el piloto de MX moderno que exige excelencia en protección y precisión aerodinámica, este casco cuenta con una carcasa de composite ligero que reduce la fatiga durante largas jornadas de competición. El avanzado sistema de ventilación garantiza que tu cabeza se mantenga fresca incluso en las condiciones más exigentes, mientras que el forro EPS de densidad múltiple ofrece una protección contra impactos superior, adaptada a la forma única de tu cabeza. Con su diseño agresivo y la integración perfecta de tecnología de seguridad, el SM-5 Course no es solo un casco; es tu aliado definitivo hacia la victoria. Experimenta la combinación perfecta de estilo, rendimiento y seguridad que solo Alpinestars puede ofrecer.
Key Highlights:
Rider Profile & Intended Use
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Product Concept & Specifications
Alpinestars (Italy)Engineering & Biomechanical Safety Analysis
El SM-5 Course utiliza el forro EPS de densidad múltiple patentado por Alpinestars y una arquitectura de carcasa de composite para maximizar la absorción de impactos manteniendo un perfil ligero. Su diseño aerodinámico está específicamente ajustado para el motocross, con un visor de perfil bajo y canales de flujo de aire optimizados que reducen la resistencia sin comprometer la eficiencia de refrigeración durante la conducción de alta intensidad.
The Alpinestars SM5 Course Blue is engineered as a high-integrity Dirt/MX protective system, utilizing a structural shell constructed from Polymer. 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.
Safety & Certifications
Acoustics & Aerodynamics
Technology & Convenience
Regional Legality & Compliance
Certified for use in the United States; meets DOT FMVSS 218 standards.
Compliant with ECE 22.05 regulations for use in European markets.
Accepted for use in Canada under DOT standards.
Regional Legality Guidance
Interactive Size & Fit Finder
Alpinestars SM5 is a motocross/dirt helmet designed for off-road use; it does not feature integrated speakers, HUD compatibility, or specific road-legal homologation standards like ECE 22.06. Designed for Intermediate Oval head shape.
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.
View on retailers
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Calibrated for upright windscreen deflection, all-terrain dust filtration, and long-travel suspension dynamics.
Data Confidence & Verification Provenance
Helmetsan enforces field-level verification and multi-source cross-referencing. Unverified values are explicitly flagged rather than estimated.