Alpinestars Youth Motocross Helmets

The Alpinestars SM3 Youth Helmet is anatomically engineered and profiled for younger riders, delivering the same high levels of protection and performance found in Alpinestars’ adult helmet range. Optimised for MX, Enduro, and off-road riding, it combines lightweight construction, advanced ventilation, and enhanced impact protection to keep young riders safe and comfortable in all conditions.

Every detail of the SM3 Youth Helmet has been designed to deliver confidence, comfort, and cutting-edge safety, giving young riders the protection they need as they build their skills.

Key Features:

• Advanced Shell Construction – thermo-injected polymer blend shell with varying thickness for the ideal balance of lightweight performance and impact resistance
• Optimised Ventilation – 10 intake vents and 7 exhaust ports ensure maximum airflow and effective heat dissipation.
• Rotational Force Protection – patented low-friction EPS liner coating reduces rotational acceleration from angled impacts, simulating the brain’s natural defence mechanism.
• Patented Visor Release System – visor detaches at a pre-set force to help reduce neck stress during impact.
• Multi-Density EPS Liner – 5-piece inner EPS with 4 densities for precise impact energy management.
• Hydration Compatibility – integrated hydration tube channels built into the cheek pads.
• Eco-Friendly Comfort Liner – made using recycled materials for reduced environmental impact.
• Customisable Fit – replaceable crown and cheek pads available in various thicknesses for a tailored fit.
• Enhanced Chin Protection – optimized shell design and thickness exceed standard homologation requirements.
• Emergency Release System – allows safe removal of cheek pads while the helmet remains on.
• Secure Fit – 25mm soft textile chin strap with stainless steel D-rings for comfort and safety.
• Certified Protection – meets both DOT and ECE 22.06 certifications for worldwide use.

The Alpinestars SM3 Youth Helmet brings top-tier technology and safety to younger riders, ensuring maximum protection, superior ventilation, and lasting comfort on every ride.

Sizing

To determine which helmet size fits you best, measure the widest circumference of your head using a flexible measuring tape or piece of string; approximately 2cm above your eyebrows and ears as illustrated below. If your head measurement falls between two sizes, it is generally recommended to select the smaller of the two.

For maximum safety and comfort, take note of the following points when fitting the helmet (and securely fastening the chin strap):

• Helmet may take some effort to slide over your head, but should not be overly difficult
• Should fit snuggly around the crown of your head without creating uncomfortable pressure points
• The top padding presses on the top of your head
• The cheek pads press against your cheeks, so that your teeth touch the inside of your cheeks when opening / closing your mouth
• There should be no space to slide two fingers between the helmet and your temple
• Hold the helmet on either side and without moving your head, try to move the helmet up and down, and side to side. It should not be easy to move and you should feel the skin of your head and face being pulled
• Your eyes should be located in the center of the helmet's viewpoint