Alpinestars SM5 Helmet Solid Matt Black / Brown

The Alpinestars SM5 Helmet Solid Matt Black / Brown is meticulously crafted to offer MX riders superior protection and unparalleled comfort. This lightweight helmet boasts a thermo-injected shell, made from a special polymer blend with varying thicknesses, engineered to provide optimal impact protection without compromising on weight. The five-density EPS liner ensures precise density placement for enhanced impact absorption.

The SM5 helmet features a technologically advanced, impact-resistant thermoplastic outer shell available in three anatomical shell sizes. Complemented by three individual EPS inner liner sizes, the combination of inner lining and cheek padding offers six unique sizes, guaranteeing the best fitment and maximum protection. An engineered raised area with padding effectively reduces forces transmitted to the collarbone. Additionally, a patented visor release system ensures the visor detaches with the correct force, regardless of impact angle.

Significant revisions to the medium, large, XL, and 2XL lower shell volumes have made the helmet approximately 3% wider, facilitating easier on and off. This increased helmet volume also enhances impact management performance, with the SM5 achieving a 44% lower impact threshold than the regular-speed standard. The helmet meets the new ECE 22.06 standard, delivering a 44% improvement in regular-speed impact ratings, and better low-speed and high-speed linear impact scores by 32% and 31%, respectively.

The redesigned chin bar, with its sculpted base area, offers a relief section raised to clear the collarbone. The new softer EPS liner extends beyond the helmet shell, covered by a flexible rubber compound, reducing the likelihood of collarbone injuries. Enhanced ventilation is achieved through multiple air inlets and exhaust ports, ensuring maximum airflow and heat transfer. Exceptional materials and design means that the helmet remains lightweight yet robust.

The visor is designed to direct air into the ports for improved airflow, while the inner and outer surfaces are engineered to minimize oblique impact effects. Alpinestars' proprietary technology features a low-friction surface on the inner EPS liner to combat rotational impact forces effectively, making the SM5 helmet a top choice for MX riders seeking safety, comfort, and performance.

FEATURES

KEY FEATURES

• Lightweight outer shell is constructed from a technologically advanced impact resistant thermoplastic in three anatomical shell sizes, plus three individual EPS inner liner sizes with a combination of inner lining and cheek padding to offer 6 unique sizes and to ensure the best fitment and protection

PROTECTION

• An engineered raised area with padding effectively reduces the forces transmitted to the collarbone and a patented visor release system that ensures the visor is released with the correct pre-determined amount of force, irrespective of the angle of impact
• Revised the medium, large, XL, and 2XL lower shell volume to be around 3% wider to make the helmet easier to put on and take off, where the increase in helmet volume has also improved the impact management performance which is now 44% lower than the regular-speed threshold
• For the new ECE 22.06 standard, the SM5 achieves a 44% better regular-speed impact rating compared to the current 33% figure, as well as a 32% better low-speed, and 31% better high-speed linear impact score than the prevailing standard
• Multiple density inner liner to ensure the correct density in the correct area for enhanced impact absorption
• Redesigned chin bar’s new profile, where the base area has been specifically sculpted to give a relief section, raised to clear the collarbone, with a new softer EPS liner which extends beyond the helmet shell itself, and is covered by a more flexible rubber compound providing a reduced chance of any sort of collarbone injury
• Maximized ventilation and high levels of heat transfer exchange thanks to multi-air inlets and exhaust ports
  
• The visor has been designed to direct air into the ports for enhanced airflow.

CONSTRUCTION

• The inner and outer surfaces are engineered to minimize the effects of oblique impacts. To help fight and mitigate those rotational impact forces, Alpinestars has designed a proprietary technology by creating a low friction surface on the inner surface of the EPS liner. For the ECE 22.06 standard, which now includes the rotational oblique impact rating, the SM5 scores 70% under the new regulation
• Patented visor release system ensures the visor is released with the correct pre-determined amount of force, irrespective of the angle of impact

SIZE GUIDE

Using a measuring tape, measure the head circumference at the head's widest point, just above the eyebrows and the ears.