The Alpinestars SM3 Helmet in Small is designed for motocross, enduro, and off-road riding, combining impact protection, lightweight performance, and rider comfort. Finished in Radium Red, Red Fluo, and White, this helmet features a thermo-injected shell made from an impact-resistant thermoplastic polymer blend with varied thicknesses. This construction is engineered to provide an effective balance of protection and reduced weight for demanding off-road use. The manufacturer and vendor part number is 8300826-3216-S.
The SM3 helmet uses an inner composite-fiber shell positioned between the outer shell and the EPS liner for added impact protection. Its six-piece EPS liner incorporates five densities to help manage impact energy in specific areas while maintaining a streamlined design. A polished EPS surface with a low-friction coating helps reduce friction between the liner and comfort padding, supporting rotational impact management during certain oblique impacts. The engineered inner and outer surfaces are designed to help minimize the effects of angled impacts.
Ventilation is supported by ten intake ports and seven exhaust ports, while the visor directs airflow into the helmet for enhanced heat transfer and rider comfort. The visor release system is designed to release at a predetermined force, helping reduce forces transferred to the rider’s neck during an impact. The removable comfort liner uses recycled materials, and integrated hydration tube channels in the cheek pads provide convenient routing for hydration systems. A soft textile chin strap with stainless steel D-rings provides a secure, comfortable fit.
For added protection and serviceability, the Alpinestars SM3 includes an Emergency Release System and removable cheek pads that can be taken out while the helmet remains on the rider. Three-dimensional contoured cheek-pad foam improves comfort, while the chin area is optimized for impact performance. The crown and cheek pads allow the fit to be tailored to the rider’s head. This Small Alpinestars SM3 off-road helmet is supplied under manufacturer model SM3 and part number 8300826-3216-S, making it suitable for riders seeking advanced protection and ventilation for motocross, enduro, and off-road applications.
Features:
- Shell Construction: Thermo-injected impact-resistant thermoplastic shell with varied thicknesses for a balance of protection and lightweight performance.
- Off-Road