Alpinestars S-M3 Radium Helmet, Motocross Helmet, Black White and Gray Glossy, featuring a white visor with black branding, glossy black shell with prominent white Alpinestars logos and gray graphic accents, aerodynamic design for off-road racing

Alpinestars S-M3 Radium Helmet, Motocross Helmet, Black White and Gray Glossy, front-facing view, featuring an aggressive shell design with a white visor, black chin guard, and mesh-lined ventilation ports.

S-M3 Radium Helmet ECE 22.06

motocross helmets

Regular price: €249,95

Size

Size guide

Color Black White Gray Glossy

Product variants

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Expertly designed for MX and Enduro, the S-M3 Radium Helmet features an advanced thermo-injected shell with varying thicknesses to optimize impact protection and weight. Rigorously tested to exceed ECE 22.06 standards, it utilizes a patented low-friction liner and a multi-density EPS structure to manage rotational acceleration and oblique impacts. This ventilated off-road helmet includes a patented visor release system and integrated hydration tube channels for superior rider comfort.

Advanced Shell Construction: Features a thermo-injected shell with a specialized polymer blend and engineered thickness to provide the optimal balance of lightweight performance and high-impact protection (Weight: 1430g ECE / 1460g DOT).
Maximized Ventilation System: Engineered with 10 intake ports and seven exhaust ports to ensure high levels of heat transfer and constant airflow during intense riding.
Rotational Acceleration Force Protection: Utilizes a patented low-friction coating on the inner EPS liner that acts as a slip plane to reduce brain-jarring rotational forces during oblique impacts.
Patented Visor Release System: Designed to release the visor with a precise, pre-determined force during an impact to significantly reduce stress and potential injury to the rider's neck.

Optimized shell thickness and structure in the chin area for superior impact performance, exceeding standard homologation requirements.
Engineered inner and outer surfaces designed to minimize the effects of oblique impacts.
Emergency Release System and removable 3D contoured foam cheek pads allow for safe and easy helmet removal by rescue services.
25mm soft textile chin strap provides optimal safety and a secure fit.
Stainless steel D-rings for a reliable and tight closure.
Fully conforms to ECE 22.06 homologation and DOT certification for global use.

Optimized chin area shell thickness and structure for superior impact performance, exceeding homologation standards.
Engineered inner and outer surfaces designed to minimize the effects of oblique impacts.
Emergency Release System (ERS) with removable 3D contoured foam cheek pads for safe helmet removal.
25mm soft textile chin strap for secure and comfortable fastening.
Stainless steel D-rings ensuring a tight and reliable fit.
Certified to ECE 22.06 homologation and DOT standards for global use.