Alpinestars · S-M5 Action
Alpinestars S-M5 Action Silber Metallisch
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 S-M5 is a motocross/dirt bike helmet designed for off-road use. It features an open visor design and typically utilizes a multi-position dial retention system rather than a full-face closure.
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"
Beherrsche die Motocross-Strecke mit dem Alpinestars S-M5 Action in auffälligem Silber-Metallic-Design. Entwickelt für anspruchsvolle Fahrer, die unnachgiebigen Schutz ohne Kompromisse beim Stil verlangen, überzeugt dieses Helm-Modell mit einem fortschrittlichen aerodynamischen Profil, das Luftwiderstand und Windgeräusche bei hohen Geschwindigkeiten reduziert. Das Innenfutter besteht aus hochwertigem, feuchtigkeitsableitendem Polster, das auf eine ovale Kopfform mittlerer Größe abgestimmt ist und so einen sicheren, komfortablen Sitz während anstrengender Trainingseinheiten oder Meisterschaftsrennen garantiert. Dank robuster Belüftungskanäle und eines schnellen Visier-Schnellsystems sorgt der S-M5 Action für optimale Luftzirkulation und beste Sichtverhältnisse, wenn es darauf ankommt. Ob bei der Fahrt durch tiefe Spuren oder beim Spurt auf geraden Strecken – dieser Helm gibt dir das nötige Vertrauen und die Klarheit, um deine Grenzen sicher auszureizen.
Rider Profile & Intended Use
Wo kaufen
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|---|---|---|---|
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Preisverlauf & Trends
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Product Concept & Specifications
Alpinestars (Italy)Engineering & Biomechanical Safety Analysis
Die S-M5 Action nutzt Alpinestars' proprietären EPS-Innenliner mit einer mehrschichtigen Schaumstoffstruktur, um die Stoßabsorption über verschiedene Aufprallvektoren zu optimieren. Die aerodynamische Schalengeometrie reduziert bei hohen Geschwindigkeiten turbulente Luftströmungen, während das integrierte Visiersystem eine schnelle Entfaltung und sichere Fixierung bei aggressiven Offroad-Manövern gewährleistet.
The Alpinestars S-M5 Action Silber Metallisch is engineered as a high-integrity Dirt/MX protective system, utilizing a structural shell constructed from Composite. 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 22.06, 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
Interactive Size & Fit Finder
Alpinestars S-M5 is a motocross/dirt bike helmet designed for off-road use. It features an open visor design and typically utilizes a multi-position dial retention system rather than a full-face closure.
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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Compatible Accessories
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Compatible Motorcycles for the Alpinestars S-M5 Action Silber Metallisch
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.