Alpinestars · S-M5 Action · Alpinestars S-M5 Action
Alpinestars S-M5 Action Stripe TC-1
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.
Designed for dirt/MX riding; features action stripe detailing and TC-1 specific construction.
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 with the Alpinestars S-M5 Action Stripe TC-1, a pinnacle of modern dirt bike helmet engineering designed for riders who demand uncompromising safety without sacrificing style. This premium off-road helmet features the advanced MIPS+ technology, ensuring superior protection against rotational forces in high-speed crashes while maintaining an aggressive, race-ready aesthetic. The iconic action stripe graphic isn't just visual flair; it signifies a heritage of performance that meets today's toughest FIM homologation standards. Engineered with a lightweight yet incredibly rigid composite shell, the S-M5 offers exceptional ventilation efficiency, keeping you cool during grueling endurance stages. Whether you are conquering technical motocross tracks or pushing limits on closed-course enduro runs, this helmet provides the perfect balance of aerodynamic smoothness and protective reliability. Experience the confidence that comes from wearing gear built by experts who understand the brutal reality of off-road racing.
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 S-M5 Action Stripe TC-1 utilizes Alpinestars' proprietary MIPS+ rotational impact protection system integrated with a multi-density EPS liner to manage energy dispersion during high-speed impacts. Its aerodynamic shell design features optimized air channels that channel airflow from the chin bar through the visor vents, significantly reducing thermal buildup while maintaining structural rigidity for motocross and enduro applications.
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
Designed for dirt/MX riding; features action stripe detailing and TC-1 specific construction.
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.
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.