SM3 Helmet - Radium - Gloss Black/Red Fluo/White - Medium
The Alpinestars SM3 Helmet Radium is designed for off-road enthusiasts seeking optimal protection, lightweight comfort, and superior airflow. Featuring a thermo-injected shell with a specialized polymer blend, this helmet offers varied thickness construction that balances impact resistance with low weight, making it ideal for motocross, enduro, and offroad riding. The impact-resistant thermoplastic outer shell is complemented by an inner layer constructed with a composite fiber, enhancing impact absorption and overall durability. The helmet's fit can be precisely adjusted with crown and cheek pads, providing a secure and comfortable fit for riders of different head shapes and sizes.
The six-piece EPS liner, with five densities, is engineered to manage impact forces effectively while keeping weight minimal. Its polished inner surface with a special coating reduces friction, enabling rotational impact management and decreasing the risk of injury during oblique impacts. The multi-density liner, combined with a low-friction coating, ensures that the helmet absorbs shocks efficiently without adding unnecessary weight.
Ventilation is a key feature of the SM3 helmet, with ten inlet vents and seven exhaust ports that maximize airflow and heat transfer. The visor is designed to direct air into the ports, enhancing cooling and rider comfort. Additionally, the visor release system is calibrated to release with a controlled force, reducing strain on the rider's neck during impacts. The helmet also incorporates a recycled material-based comfort liner and integrated hydration channels within the cheek pads for convenience during demanding rides.
Safety features include an Emergency Release System with removable cheek pads for quick and secure removal, a 3D contoured foam for enhanced comfort, and an optimized chin area for superior impact performance. The helmet is secured with stainless steel D-rings, ensuring a tight and reliable fit. The soft 25 mm textile chin strap adds to rider comfort and safety. This helmet combines performance, protection, and eco-conscious design to meet the demands of serious off-road riders, making it a versatile and reliable choice for motocross, enduro, and offroad adventures.
Features:
- Varied thickness shell construction for optimized impact protection and lightweight performance
- Impact-resistant thermoplastic outer shell for durability and safety
- Composite fiber inner shell for maximum impact absorption
- Adjustable fit with crown and cheek pads for personalized comfort
- Multiple density EPS liner with five different densities for effective impact management
- Polished inner EPS liner with friction-reducing coating for rotational impact control
- Enhanced ventilation with ten inlet and seven exhaust ports for superior airflow
- Visor designed to direct airflow into vents, improving cooling efficiency
- Visor release system calibrated for controlled release, reducing neck strain during impacts
- Eco-friendly comfort liner made from recycled materials
- Integrated hydration channels within cheek pads for hydration on the go
- Removable cheek pads with Emergency Release System for quick, safe removal
- 3D contoured foam for increased rider comfort
- Optimized chin area for superior impact performance
- Stainless steel D-rings for a secure and reliable fit
- Soft textile chin strap for added safety and comfort