Alpinestars SM5 Mineral Motorcycle Helmets

The SM5 Helmet is the result of intensive engineering designed to provide MX riders with elite-level protection and comfort. Featuring a lightweight thermo-injected shell, this helmet utilizes a sophisticated polymer blend to balance impact resistance with weight efficiency.

Advanced Construction 

• Impact-Resistant Shell: Constructed from technologically advanced thermoplastic for superior durability.

• Anatomic Sizing: Available in three anatomical shell sizes and three individual EPS liner sizes to ensure a perfect fit across 6 unique sizes.

• Five-Density EPS Liner: Engineered with varying densities in specific zones to maximize impact absorption and energy management.

• Optimized Weight: The ECE version weighs approximately 1,350 grams (Size Medium), reducing neck fatigue during long rides.

Key Performance Features 

• Collarbone Protection: Features an engineered raised area with specialized padding to reduce force transmission to the collarbone.

• Revised Shell Volume: The lower shell (Sizes M to 2XL) is 3% wider, making it easier to put on and take off while improving impact management by 44%.

• Superior Ventilation: Multi-air inlets and exhaust ports maximize heat transfer and airflow.

• Aerodynamic Visor: Designed to direct fresh air into the ports for enhanced cooling.

• Easy Entry: Redesigned chin bar profile with a softer EPS liner to minimize injury risks.

Safety & Protection Standards 

• ECE 22.06 Certified: Conforms to the latest safety regulations with significantly improved scores.

• Impact Performance:

  • 44% better regular-speed impact rating.

  • 32% better low-speed linear impact score.

  • 31% better high-speed linear impact score.

• Patented Visor Release: Ensures the visor detaches with a pre-determined force regardless of the impact angle to prevent rotational injury.

• Oblique Impact Mitigation: Low-friction inner surfaces help fight and mitigate rotational impact forces, scoring 70% better under new regulations.