The Alpinestars SM3 Helmet in Radium Red, Red Fluo, and White is engineered for motocross, enduro, and off-road riding. This 2XL helmet combines impact protection, ventilation, comfort, and lightweight performance in a thermo-injected shell made from an advanced polymer blend with varied thickness. The Alpinestars manufacturer and vendor part number is 8300826-3216-2X, providing a precise reference for fitment and replacement selection.
The helmet uses a lightweight, impact-resistant thermoplastic outer shell with a composite fiber inner structure positioned between the shell and EPS liner for enhanced impact protection. A six-piece, multi-density EPS liner uses five densities to help manage impact energy in the appropriate areas while supporting overall weight reduction. The polished EPS surface features a low-friction coating designed to reduce friction between the liner and comfort padding, helping manage rotational forces associated with certain oblique impacts. The inner and outer surfaces are engineered to help minimize the effects of angled impacts.
Ten intake vents and seven exhaust ports promote airflow and heat exchange during demanding rides, while the visor is shaped to direct air into the ventilation system. A visor release system is designed to release at a predetermined force to help reduce forces transferred to the rider's neck during an impact. The recycled-material comfort liner supports a lower-impact construction approach, and removable cheek pads with an Emergency Release System allow for safer, easier helmet removal by trained responders. Integrated hydration tube channels, a soft textile chin strap, stainless steel D-rings, and adjustable crown and cheek padding provide practical comfort and a secure fit for off-road riders. The Alpinestars SM3 2XL helmet is intended for riders seeking dependable protection and performance for motocross, enduro, and recreational off-road applications.
Features:
- Varied-thickness thermo-injected shell: Uses an engineered polymer blend to balance impact protection and lightweight performance.
- Off-road riding design: Optimized for motocross, enduro, and off-road applications.
- Composite fiber inner structure: Adds protection between the impact-resistant outer shell and EPS liner.
- Multi-density EPS liner: Six-piece construction with five densities helps manage impact energy in designated areas.
- Low-friction EPS coating: Helps reduce friction and rotational acceleration forces during certain oblique impacts.
- Ventilation system: Ten intake vents and seven exhaust ports support airflow and heat transfer.
- Visor release system: Releases at a predetermined force to help reduce neck loading during an impact.
- Emergency Release System: Removable cheek pads support safer helmet removal by trained responders.
- Comfort-focused fit: Adjustable crown and cheek pads, 3D-contoured foam, and a soft textile chin strap improve rider comfort.
- Hydration tube channels: Integrated into the cheek pads for convenient hydration-system routing.
- Secure retention: Stainless steel D-rings provide a tight and dependable fit.
- Product identification: Alpinestars manufacturer and vendor part number 8300826-3216-2X.