The Alpinestars SM3 Heat Helmet is engineered for motocross, enduro, and off-road riding, delivering a balanced combination of impact protection, low weight, ventilation, and rider comfort. This Large helmet features a gloss white, purple, and pink finish and uses a thermo-injected shell made from an impact-resistant thermoplastic polymer blend with varied thicknesses for optimized protection. Manufacturer part number 8301026-2052-L and vendor part number 8301026-2052-L identify this Alpinestars helmet configuration.
Its lightweight outer shell is paired with a composite fiber layer and a six-piece, multi-density EPS liner designed to manage impact energy across key areas of the helmet. A polished EPS surface with a low-friction coating helps reduce rotational acceleration associated with certain oblique impacts. The crown and cheek pads allow the fit to be tailored to the rider, while removable cheek pads and the integrated Emergency Release System support safer helmet removal after an incident. Stainless steel D-rings provide a secure, adjustable closure, and the 25 mm soft textile chin strap helps improve comfort during extended rides.
Ten intake vents and seven exhaust ports promote airflow and heat exchange, with the visor designed to direct air into the ventilation system. The visor release system is calibrated to release at a predetermined force, helping reduce forces transferred to the rider’s neck during an impact. Recycled materials in the comfort liner help reduce environmental impact, while integrated hydration tube channels in the cheek pads add practical convenience for off-road use. The Alpinestars SM3 fits riders seeking dependable protection and performance for motocross, enduro, and off-road applications.
Features:
- Size: Large
- Model: SM3 Heat
- Brand: Alpinestars
- Manufacturer part number: 8301026-2052-L
- Vendor part number: 8301026-2052-L
- Finish: Gloss white, purple, and pink
- Application: Motocross, enduro, and off-road riding
- Shell construction: Thermo-injected impact-resistant thermoplastic polymer blend with varied thickness
- Impact protection: Composite fiber layer and six-piece, five-density EPS liner
- Rotational impact management: Low-friction coating on the inner EPS liner
- Ventilation: Ten intake vents and seven exhaust ports
- Fit adjustment: Removable crown and cheek pads
- Emergency protection: Emergency Release System with removable cheek pads
- Closure: Stainless steel D-rings and 1-inch soft textile chin strap
- Convenience: Integrated hydration tube channels in the cheek pads
- Visor safety: Predetermined-force visor release system