S-M3 Radium Helmet ECE 22.06

motocross | helmets

£199.99

Color:Red Mot Red Fl White Gl

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The SM3 is the latest evolution of Alpinestars’ MX helmet, developed for motocross, enduro, and aggressive off-road riding with a focus on lightweight performance and rider comfort.
Constructed with an advanced thermo-injected shell, optimized ventilation, and patented technologies to help manage oblique impacts and reduce neck loads in a crash, it brings premium protection to every ride.
Emergency cheek-pad release, hydration compatibility, and a tunable fit enhance usability on demanding days in the dirt.

Hydration tube channels: integrated routing in the cheek pads keeps a drink line neatly in place for easier access on long motos and enduro stages.
Emergency release system: removable cheek pads support faster helmet removal after an incident, helping make post-crash handling more efficient.
Tunable interior fit: interchangeable crown and cheek pads in multiple thicknesses let riders fine-tune comfort and stability for a more personalized feel.
Off-road usability: rider-focused interior features are built to support practical, race-day convenience when conditions and stints get demanding.

The inner and outer surfaces are engineered to minimize the effects of oblique impacts.
Five EPS inner sections with four densities are integrated to manage impact energy across different impact scenarios.
The fit can be tailored to the rider’s head with crown and cheek pads available in different thicknesses, helping maintain secure and stable protective positioning.
The SM3 helmet conforms to DOT certification and ECE 2206 homologation.

Thermo-injected shell constructed from a special polymer blend with varying shell thicknesses across the structure to keep the build lightweight.
Reinforced chin area with optimized shell thickness and helmet geometry for a more robust front structure.
Multi-density EPS liner with 5 inner parts and 4 densities, paired with inner and outer surface shaping to form the helmet’s impact-absorbing structure.
Emergency Release System with removable cheek pads and 3D-contoured foam padding for a modular interior assembly.
Soft 25 mm textile chin strap with stainless steel D-rings for the retention system.
Approximate weight: 1430 g (ECE) / 1460 g (DOT), size M.