Alpinestars · S-M5 Action
Alpinestars S-M5 Action
Design Concept & Background
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Alpinestars S-M5 Action 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
Where to buy
| Marketplace | Price | Availability | Updated | |
|---|---|---|---|---|
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Amazon (US)
Store Profile
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$249.95 | ● In Stock | 1 second ago | Buy Now → |
Certified Alpinestars Stores in US
Price History
Product Concept & Specifications
Alpinestars (Italy)Engineering & Technical Analysis
The Alpinestars S-M5 Action utilizes a multi-density EPS liner and an advanced retention system to ensure precise head retention during aggressive motocross maneuvers. Its aerodynamic shell design minimizes wind turbulence while the integrated sun visor and acoustic foam strategically dampen high-frequency noise without compromising breathability.
Fit & Shell Structure
Intermediate Oval Shape
Balanced oval fit: standard ergonomic curvature fitting 80%+ of riders.
Safety & Certifications
Acoustics & Aerodynamics
Moderate Index: Standard wind noise suppression at highway speeds. High flow channels optimize high-velocity dynamic ventilation.
Technology & Convenience
Regional Legality & Compliance
Compliant with FMVSS 218 standards for off-road and street use where applicable.
Meets current ECE 22.06 safety regulations for motorcycle use.
Regional Legality Guidance
Interactive Size & Fit Finder
Designed for dirt/MX riding; Alpinestars S-M5 Action features a multi-density EPS liner and extended coverage for off-road use.
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.
Part numbers
| Product style | MFR. product # | SKU | Availability |
|---|---|---|---|
| Gloss Black / | — |
ALP-SM5A-BLK | instock |
| Silver Metallic / | — |
ALP-SM5A-GRE | instock |
| Hi-Viz Yellow / | — |
ALP-SM5A-YEL | instock |
| Stripe TC-1 / | — |
ALP-SM5A-STR | instock |
Available Colors & Graphics
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