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The Alpinestars SM3 Radium Helmet is engineered to elevate off-road riding safety, comfort, and performance. Crafted with a thermo-injected polymer blend with variable thickness, it offers robust impact protection while maintaining a lightweight feel, making it ideal for extended rides. The helmet conforms to both DOT and ECE 2206 standards, ensuring it meets international safety benchmarks for motorcycle helmets. Its innovative design incorporates a slip-plane layer that mimics the brain's natural defense mechanism, providing enhanced protection against rotational forces during oblique impacts.
Designed for optimal airflow, the SM3 features 10 intake vents and 7 exhaust ports that facilitate maximum air circulation and heat transfer. This cooling system helps keep riders comfortable during intense, prolonged sessions. The helmet's patented visor release system releases the visor with a carefully calibrated force to reduce neck strain and risk during impacts, adding an extra layer of safety. Additionally, Alpinestars’ patented low-friction coating on the EPS liner reduces rotational acceleration forces, further safeguarding the rider’s head in crash scenarios.
The snug yet breathable fit of the SM3 ensures comfort over long distances, while the glossy black, red fluorescent, and white finish adds a striking aesthetic. Designed with ease of use in mind, this helmet combines cutting-edge technology with ergonomic features to provide riders with confidence and peace of mind on any trail or off-road environment. Whether navigating rough terrain or enjoying casual rides, the SM3 Radium Helmet delivers reliable protection, superior ventilation, and a comfortable fit for off-road enthusiasts.
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