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Alpinestars · S-M5 Action · Alpinestars S-M5 Action

Alpinestars S-M5 Action Hi-Viz Yellow

DOT ECE 22.06
Alpinestars S-M5 Action Hi-Viz Yellow
Alpinestars S-M5 Action Hi-Viz Yellow
Alpinestars S-M5 Action Hi-Viz Yellow

Design Concept & Background

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Alpinestars S-M5 Action Hi-Viz Yellow is a high-performance Dirt/MX helmet engineered by Alpinestars to meet high standards of safety and comfort. Inspect its detailed design background and specifications below.

Rider Profile & Intended Use

Riding Style Dirt/MX Riding
Helmet Category Dirt/MX
Internal Fit Shape Intermediate Oval
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Where to buy

Best price $249.95 Amazon (US)
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Price History

Product Concept & Specifications

Alpinestars (Italy)

Engineering & Technical Analysis

The S-M5 Action utilizes Alpinestars' proprietary Multi-Directional Impact Protection System (MIPS) integrated within a lightweight composite shell to mitigate rotational forces during off-road impacts. Its aggressive aerodynamic contouring reduces wind buffeting at high speeds, while the extensive venting network ensures thermal regulation without compromising structural rigidity.

Fit & Shell Structure

Intermediate Oval Shape

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

[MATR.SHEL] Shell Construction Composite Outer structural material
[PHYS.MASS] Measured Weight 1150g (2.54) Approximate medium size weight
[COVG.YEAR] Warranty 2 Manufacturer coverage duration
[OPER.ROLE] Primary Use Case Dirt/MX Riding Optimized riding orientation

Safety & Certifications

[SYS.CERT] Homologation ECE 22.06 Certified safety standard
[SYS.PROT] Rotational Protection None Mitigates rotational impact
[SYS.EQRS] Emergency Release Not Equipped Cheek pad quick removal
[SYS.LOCK] Retention Strap Double D-Ring Chin strap buckle style

Acoustics & Aerodynamics

98 dB
Acoustics
8 /10
Ventilation

Moderate Index: Standard wind noise suppression at highway speeds. High flow channels optimize high-velocity dynamic ventilation.

[AERO.TEST] Wind Tunnel Tested No Optimized shell aerodynamics
[VISR.FOG] Pinlock Tech Not Included Anti-fog shield insertion

Technology & Convenience

[SYS.COMM] Comms Integration Generic Speaker Cutouts Intercom cutout availability
[FIT.GLASS] Glasses Friendly No Inner lining eyewear grooves
[VISR.SYS] Visor Shield Tech Single Visor Integrated drop-down sun visor
[FIT.LINR] Removable Interior Partial / Fixed Washable lining modules

Regional Legality & Compliance

🇺🇸 US Legal
Required: DOT

Compliant with FMVSS 218 standards for off-road and street use where applicable.

🇪🇺 EU Legal
Required: ECE 22.06

Meets current ECE 22.06 safety regulations for motorcycle use.

Regional Legality Guidance

US

Status: Legal

Required: DOT

Compliant with FMVSS 218 standards for off-road and street use where applicable.

EU

Status: Legal

Required: ECE 22.06

Meets current ECE 22.06 safety regulations for motorcycle use.

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