Alpinestars S-M10 Motocross Helmet
The Alpinestars S-M10 is a premium motocross helmet engineered to deliver advanced impact management, excellent ventilation and a precise anatomical fit. Its smooth, streamlined shell creates an attractive aerodynamic profile without external channels or unnecessary features that could act as load points during an impact or compromise the helmet’s structural integrity.
Carefully engineered surface curvature helps reduce friction during an impact, promoting deflection and energy transfer to reduce direct forces transmitted to the rider’s skull, neck and spinal column.
Anatomically Optimized Shell Construction
The Alpinestars S-M10 shell-sizing system provides an appropriately sized shell for each helmet fit size. This anatomical approach gives riders a more accurate fit while improving comfort, reducing unnecessary weight and enhancing the helmet’s ability to perform as designed during an impact.
The chin bar base is specially sculpted with a raised relief section to provide additional clearance around the collarbone. A soft EPS liner extends beyond the helmet shell and is covered with a flexible rubber compound to help reduce the possibility of collarbone injury.
A-Head Fitment System
The innovative A-Head Fitment System allows riders to adjust both the height and angle at which the helmet sits on the head. This customizable system helps create a more secure, comfortable and personalized fit for different head shapes and riding preferences.
Advanced Impact Protection
The S-M10 is engineered to address rotational acceleration and forces created during oblique impacts. Removable side pads constructed from a semi-soft polymer provide additional protection and create a larger contact area to help distribute impact energy.
The helmet also incorporates an Emergency Release System and Eject helmet-removal technology to assist with helmet removal following an accident.
Ultra-Ventilated Design
With 28 individual intake and exhaust ports—excluding the large eye port—the Alpinestars S-M10 provides exceptional airflow during demanding riding conditions.
The ventilation system includes:
- 18 air-intake ports
- 10 exhaust ports
- Large eye-port opening
- Efficient internal airflow
- Effective heat and moisture evacuation
This extensive ventilation network helps keep riders cooler and more comfortable during motocross racing, trail riding and other demanding off-road conditions.
Emergency Visor Protection
The S-M10 features an Emergency Visor Release system designed to allow the visor to release under specific impact conditions. The visor extension provides additional coverage and protection while maintaining the helmet’s streamlined aerodynamic profile.
Key Features
- Smooth and aerodynamic shell profile
- Streamlined construction without external impact load points
- Surface curvature designed to reduce friction during an impact
- Energy-deflecting design helps reduce direct forces
- Individual shell sizing for a precise anatomical fit
- Reduced overall helmet weight
- Sculpted chin-bar relief provides collarbone clearance
- Extended soft EPS liner with flexible rubber covering
- Adjustable A-Head Fitment System
- Adjustable helmet height and angle
- 28 individual ventilation ports
- 18 intake ports and 10 exhaust ports
- Technology addressing rotational acceleration and oblique impacts
- Eject helmet-removal system
- Emergency Release System
- Emergency Visor Release
- Protective visor extension
- Removable semi-soft polymer side pads
- Expanded contact area helps distribute impact energy
Product Specifications
- Brand: Alpinestars
- Model: S-M10
- Product Type: Motocross and off-road motorcycle helmet
- Fit System: Adjustable A-Head Fitment System
- Ventilation: 28 individual ports
- Air Intakes: 18
- Air Exhausts: 10
- Side Protection: Removable semi-soft polymer pads
- Helmet-Removal Technology: Eject system and Emergency Release System
- Visor System: Emergency Visor Release with visor extension
- Chin-Bar Design: Raised collarbone-relief section
- Impact Management: Designed for direct, rotational and oblique impact forces
Why Choose the Alpinestars S-M10?
The Alpinestars S-M10 combines an anatomically optimized fit, extensive ventilation and advanced impact-management technology in a lightweight, aerodynamic design. From its adjustable A-Head Fitment System to its emergency-release features and strategically shaped shell, every detail is engineered around rider comfort, performance and protection.
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