Alpinestars 2027 S-M3 Radium MX Helmet Red White Blue Yellow Flou

Description

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.

Key Features

• 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.

Protection

• 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.

Construction

• 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.