Explore new horizons with confidence in the Alpinestars SM3 Radium motocross helmet

With the SM3 Radium motocross helmet, every ride becomes a mastered adventure.

Designed for off-road enthusiasts, it incorporates technical innovations that increase protection against impacts while maintaining an exceptional level of comfort.

Whether you're riding on a motocross track or tackling the steepest enduro trails, this helmet guarantees remarkable ease of use and efficient ventilation.

Its modern and lightweight structure makes it an essential ally for all those who demand the best in terms of safety and performance.

FEATURES :

• Advanced shell construction : This helmet features a thermo-injected shell incorporating a special polymer blend, reinforced with different thicknesses designed to provide the best balance between impact protection and lightness. The SM3 model in medium size weighs 1430 g (ECE) and 1460g (DOT).
• Ventilation : Optimized ventilation and excellent heat transfer thanks to 10 air inlets and 7 exhaust outlets.
• Rotational force protection : A patented low-friction coating, applied to the inside of the main EPS liner, helps reduce rotational acceleration forces generated by certain angled impacts. This layer acts as a glide plane, mimicking the brain's cerebrospinal fluid, which is the body's natural defense against these types of impacts.
• Visor detachment : The patented visor release system ensures that the visor detaches with a precise pre-set force, effectively reducing stress on the rider's neck in the event of an impact.

DESIGN :

• The interior and exterior surfaces are designed to minimize the effects of angled impacts.
• 5 internal EPS parts with 4 different densities allow for efficient volume management and performance in the event of an impact.
• Hydration tube channels are integrated into the helmet's cheek pads for added convenience and performance.
• The inner lining is made from recycled materials to reduce the carbon footprint.
• The fit can be customized thanks to the shell and cheek pads available in different thicknesses, offered as original spare parts.