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SM3 Helmet - Radium - Red/Red Fluo/White - XL
Ten intake ports and seven exhaust ports promote airflow and heat exchange, while the visor is shaped to direct air into the ventilation channels. The visor release system is designed to release at a predetermined force to help reduce forces transferred to the rider’s neck during an impact. Integrated hydration tube channels in the cheek pads add convenience for extended rides. A soft textile chin strap, secure stainless steel D-rings, and an Emergency Release System complete the practical safety-focused design. The Alpinestars SM3 Helmet fits riders seeking reliable protection and adjustable comfort for MX, enduro, and off-road applications.
Features:
- Shell Construction: Thermo-injected polymer shell with varied thicknesses for an optimized balance of impact protection and light weight.
- Impact Protection: Lightweight impact-resistant thermoplastic outer shell combines with a composite fiber layer and EPS liner.
- Multi-Density EPS: Six-piece liner with five densities helps manage impact energy in targeted areas.
- Rotational Impact Management: Low-friction coating helps reduce friction and rotational acceleration during certain oblique impacts.
- Ventilation: Ten intake ports and seven exhaust ports support airflow and heat transfer through the helmet.
- Visor Release System: Designed to release at a predetermined force to help reduce forces on the rider’s neck during an impact.
- Adjustable Fit: Removable crown and cheek pads allow the fit to be tailored to the rider.
- Emergency Release: Removable cheek pads support safer, easier helmet removal while the helmet is being worn.
- Hydration Integration: Cheek-pad channels accommodate a hydration tube for added riding convenience.
- Chin Strap: Soft textile strap and stainless steel D-rings provide secure, comfortable retention.
- Application: Designed for motocross, enduro, and off-road riding.
- Part Number: Alpinestars manufacturer and vendor part number 8300826-3216-XL.