Alpinestars · SM5
Alpinestars SM5
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.
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
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Dominate the track and trail with the Alpinestars SM-5, a pinnacle of motocross engineering designed for riders who demand uncompromising performance. This helmet features a sleek, aggressive aesthetic that mirrors its aerodynamic efficiency, reducing drag to keep you focused on the apex. Constructed from high-strength composite materials, it offers superior impact protection without sacrificing the lightweight agility essential for racing. The advanced ventilation system channels cool air directly to critical zones, eliminating fatigue during intense heat sessions. With a precise Intermediate Oval fit and customizable retention systems, the SM-5 delivers a custom-like feel for every rider. Whether you are tackling technical forest trails or high-speed circuit laps, this helmet provides the ultimate balance of safety, comfort, and style.
Key Highlights:
Rider Profile & Intended Use
Where to buy
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Amazon (US)
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Price History & Trends
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Product Concept & Specifications
Alpinestars (Italy)Engineering & Technical Analysis
The Alpinestars SM-5 utilizes a lightweight composite shell construction reinforced with carbon fiber inserts to maximize rigidity while minimizing weight. Its internal suspension system features an advanced EPS liner with variable density zones, ensuring optimal energy absorption across diverse impact vectors typical of motocross environments.
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.
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 |
|---|---|---|---|
| Matte Black / | — |
ALP-SM5-BLK | instock |
| Pearl White / | — |
ALP-SM5-WHI | instock |
| Racer TC-2 / | — |
ALP-SM5-RAC | instock |
| Course Blue / | — |
ALP-SM5-COU | instock |
Available Colors & Graphics
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Data Confidence & Verification Provenance
Helmetsan enforces field-level verification and multi-source cross-referencing. Unverified values are explicitly flagged rather than estimated.