Alpinestars SM3 Helmet Radium Large - Gloss Black, Red Fluo & White * Impact-Resistant MX and Offroad Helmet

  • Sale
  • Regular price $274.95
Shipping calculated at checkout.
We have 70 ready to ship.


SM3 Helmet - Radium - Gloss Black/Red Fluo/White - Large

The Alpinestars SM3 Helmet Radium in Large size offers advanced protection designed specifically for motocross, enduro, and offroad riders seeking lightweight durability and superior impact absorption. Featuring a thermo-injected shell with varied thicknesses, this helmet combines optimal impact resistance with reduced weight, ensuring comfort during intense riding sessions. The impact-resistant outer shell is constructed from a high-performance thermoplastic, while the inner shell incorporates a composite fiber layer sandwiched between the outer shell and EPS liner for enhanced impact mitigation. This layered construction ensures the rider benefits from maximum protection without compromising mobility. The helmet's fit can be precisely tailored using adjustable crown and cheek pads, providing a secure and personalized fit for every rider. A six-piece EPS liner with five different densities is integrated to manage impact forces effectively, with a polished, low-friction coating on the EPS surface to reduce rotational impacts and improve impact absorption. The design minimizes oblique impact effects through carefully engineered inner and outer surfaces, further enhancing rider safety. Ventilation is a key feature, with ten intake ports and seven exhaust outlets working in tandem to promote airflow, keeping the rider cool and comfortable during demanding rides. The visor is designed to channel airflow into the ventilation ports and features a release system that activates with a controlled force, reducing strain on the rider*s neck during impact. The helmet's comfort liner is crafted from recycled materials, aligning with eco-friendly practices, and integrated hydration channels in the cheek pads add convenience. The soft textile chin strap, measuring 25 mm, ensures a secure fit, while the Emergency Release System and removable cheek pads facilitate safe and straightforward helmet removal when needed. The chin area is optimized for impact performance, and stainless steel D-rings provide a reliable, secure fastening. Overall, the Alpinestars SM3 Radium Helmet combines innovative construction, superior protection, and rider-focused comfort, making it an excellent choice for offroad enthusiasts who demand performance and safety in a lightweight package.

Features:

  • Varied thickness shell construction for optimized impact protection and reduced weight
  • Thermo-injected outer shell made from impact-resistant thermoplastic
  • Composite fiber inner shell for enhanced impact absorption
  • Adjustable crown and cheek pads for a personalized fit
  • Six-piece EPS liner with five densities for effective impact management
  • Low friction coating on EPS liner to reduce rotational impact forces
  • Maximized ventilation with ten intake and seven exhaust ports for superior airflow
  • Visor designed to direct airflow into ventilation ports for improved cooling
  • Visor release system ensures safe and controlled visor removal during impacts
  • Comfort liner made from recycled materials for eco-friendly riding
  • Integrated hydration channels in cheek pads for convenience
  • Soft textile chin strap measuring 25 mm for comfort and safety
  • Emergency Release System and removable cheek pads for easy, safe helmet removal
  • Optimized chin area for superior impact performance
  • Stainless steel D-rings for a secure fit