The Alpinestars Youth SM3 Radium Helmet is engineered for young riders who need dependable off-road protection, a comfortable fit, and effective ventilation. This small helmet features a lightweight, impact-resistant thermoplastic outer shell made with a thermo-injected polymer blend. Varying shell thicknesses are designed to provide an effective balance of impact protection and reduced weight. The Alpinestars Youth SM3 uses a multiple-density inner liner to place the appropriate density in key areas for improved impact absorption.
Designed to help manage the forces associated with oblique impacts, the helmet incorporates engineered inner and outer surfaces along with a low-friction coating on the main EPS liner. This coating acts as a slip plane to help reduce rotational acceleration forces during certain angled impacts. The visor release system is designed to release at a predetermined force, helping reduce forces transmitted to the rider’s neck during an impact. Ten intake vents and seven exhaust ports promote airflow and heat exchange, while the visor directs air toward the ventilation channels for enhanced cooling.
Fitment can be customized with replaceable crown and cheek pads available in different thicknesses. The comfort liner uses recycled materials, and integrated hydration tube channels in the cheek pads help keep hydration systems organized. A soft textile chin strap provides secure, comfortable retention, while stainless steel D-rings help maintain a dependable fit. The Emergency Release System and removable cheek pads allow trained responders to remove the cheek pads while the helmet remains in place. The Alpinestars Youth SM3 Radium is finished in Gloss Yellow Fluo, Black, and Blue and is identified by manufacturer and vendor part number 8301825-5017-YS.
Features:
- Lightweight thermoplastic shell: Thermo-injected polymer construction with engineered thickness variation for impact protection and reduced weight
- Multiple-density EPS liner: Uses targeted densities to improve impact absorption and help minimize overall weight
- Oblique-impact management: Engineered surfaces and a low-friction EPS coating help reduce rotational acceleration forces
- Ventilation system: Ten intake vents and seven exhaust ports support airflow and heat transfer
- Visor release system: Releases at a predetermined force to help reduce forces on the rider’s neck during an impact
- Customizable fit: Replaceable crown and cheek pads are available in different thicknesses
- Emergency Release System: Removable cheek pads support safer helmet removal by trained responders
- Hydration tube channels: Integrated into the cheek pads for convenient hydration-system routing
- Secure retention: Soft textile chin strap and stainless steel D-rings provide comfortable, dependable fastening
- Recycled comfort liner: Uses recycled materials to help reduce environmental impact
- Fitment: Designed for youth off-road riders requiring a small-size helmet
- Brand and part number: Alpinestars Youth SM3 Radium, manufacturer and vendor part number 8301825-5017-YS