Alpinestars MX SM3 Youth Helmets

Not Yet Reviewed

Anatomically engineered and profiled specifically for youth and younger riders, the all-new SM3 youth helmets from Alpinestars MX are optimized for motocross, Endur

Anatomically engineered and profiled specifically for youth and younger riders, the all-new SM3 youth helmets from Alpinestars MX are optimized for motocross, Enduro and off-road use, and features a whole raft of technologies and innovations taken from Alpinestars range of adult helmets to deliver the optimal blend of performance, protection and comfort. The youth medium (YM) and youth large (YL) helmet sizes share the same EPS size, which allows riders with a 'YM' size to initially buy a 'YM' helmet, and then configure it to a youth large size as they grow via the crown and cheek pad spare parts. The youth small (YS) helmets have a smaller EPS size and can be customized only via the cheek pads—Alpinestars extensive research has shown that the kids that wear an 'YS' size helmet are very small, typically 3 to 4 years old, and therefore they require a dedicated helmet fit. Instilling a safety-first mindset is crucial for young riders, Alpinestars MX offers motocross safety gear to support your child's journey and understands the sport's demands. The SM3 youth helmets are available in a variety of styles, in solid colors or with graphic designs displaying Alpinestars MX logos.

Key features of the youth helmet:

* Helmet features a thermo-injected shell incorporating a special polymer blend enhanced by varying degrees of thickness that is engineered to deliver the optimal combination of impact protection and light weight
* Separate versions of the shells for DOT and ECE requirements; the DOT certified version of the helmet's inner shell is constructed with a composite fiber assembled between the outer shell and the EPS liner for maximum protection against impacts—the SM3 helmet conforms to both DOT certification and ECE 2206 homologation for use worldwide
* The fit can be tailored to the rider's head thanks to the helmet's crown and cheek pads, which are available as spare parts in different thicknesses
* Equipped with an Emergency Release System and removable cheek pads to permit the safe and easy removal of the cheek pads while the helmet is still on, while the 3D contoured foam ensures rider comfort
* Stainless steel D-rings ensure a tight and secure fit
* Multiple density inner liner ensures the helmet is equipped with the correct density in the correct area for enhanced impact absorption, while also helping to reduce overall weight
* Inner and outer surfaces are engineered to minimize the effects of oblique impacts
* Maximized ventilation and high levels of heat transfer exchange, thanks to ten inlets and seven exhaust ports
* The visor has been designed to direct air into the ports for enhanced airflow
* Patented visor release system ensures the visor is released with the correct pre-determined amount of force, effectively reducing the forces on the rider's neck during an impact
* Comfort liner is constructed using recycled materials for a lower carbon footprint
* Hydration tube channels are integrated into the helmet's cheek pads for convenience and performance (hydration system sold separately)
* Soft textile chin strap is 25mm for optimal safety and rider comfort

Showing In Stock Items. Show All 27 Items.

Results 1 - 20 of 20

Alpinestars MX SM3 Youth Helmets 8301625-1455-YS

Helmet, SM3 Youth, Full Face, Comfort Liner, Fray Black/Orange/Yellow Fluorescent Graphic, Gloss, DOT/ECE, Youth Small, Each

Part Number: MXA-S2723

Not Yet Reviewed

Estimated Ship Date: May 6, 2026 if ordered today

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Estimated Ship Date: May 6, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8302225-110-YM

Helmet, SM3 Youth, Full Face, Comfort Liner, Matte Black, DOT/ECE, Youth Medium, Each

Part Number: MXA-8302225110YM

Not Yet Reviewed

Estimated Ship Date: May 5, 2026 if ordered today

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Estimated Ship Date: May 5, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8301825-5017-YS

SM3 YOUTH RADIUM HELMET YLW FLUO/BLK/BLUE YS

Part Number: MXA-S2729

Not Yet Reviewed

Estimated Ship Date: May 5, 2026 if ordered today

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Estimated Ship Date: May 5, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8301625-3051-YS

Helmet, SM3 Youth, Full Face, Comfort Liner, Fray Red/Yellow Fluorescent/Black Graphic, Gloss, DOT/ECE, Youth Small, Each

Part Number: MXA-S2726

Not Yet Reviewed

Estimated Ship Date: May 5, 2026 if ordered today

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Estimated Ship Date: May 5, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8302225-110-YL

Helmet, SM3 Youth, Full Face, Comfort Liner, Matte Black, DOT/ECE, Youth Large, Each

Part Number: MXA-8302225110YL

Not Yet Reviewed

Estimated Ship Date: May 5, 2026 if ordered today

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Estimated Ship Date: May 5, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8301825-5017-YL

SM3 YOUTH RADIUM HELMET YLW FLUO/BLK/BLUE YL

Part Number: MXA-S2727

Not Yet Reviewed

Estimated Ship Date: May 6, 2026 if ordered today

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Estimated Ship Date: May 6, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8302025-1574-YS

SM3 YOUTH WURX HELMET BLK/YLW FLUO/BLUE/RED YS

Part Number: MXA-S2735

Not Yet Reviewed

Estimated Ship Date: May 6, 2026 if ordered today

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Estimated Ship Date: May 6, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8301425-433-YS

Helmet, SM3 Youth, Full Face, Comfort Liner, Deegan Orange Fluorescent/Purple/Pink Fluorescent Graphic, Gloss, DOT/ECE, Youth Small, Each

Part Number: MXA-8301425433YS

Not Yet Reviewed

Estimated Ship Date: May 5, 2026 if ordered today

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Estimated Ship Date: May 5, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8302025-7312-YS

SM3 YOUTH WURX HELMET BLUE/RED/WHT/BLK YS

Part Number: MXA-S2738

Not Yet Reviewed

Estimated Ship Date: May 5, 2026 if ordered today

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Estimated Ship Date: May 5, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8301825-5017-YM

SM3 YOUTH RADIUM HELMET YLW FLUO/BLK/BLUE YM

Part Number: MXA-S2728

Not Yet Reviewed

Estimated Ship Date: May 6, 2026 if ordered today

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Estimated Ship Date: May 6, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8301625-3051-YM

Helmet, SM3 Youth, Full Face, Comfort Liner, Fray Red/Yellow Fluorescent/Black Graphic, Gloss, DOT/ECE, Youth Medium, Each

Part Number: MXA-S2725

Not Yet Reviewed

Estimated Ship Date: May 5, 2026 if ordered today

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Estimated Ship Date: May 5, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8301825-9510-YL

SM3 YOUTH RADIUM HELMET GRY/BLK/YLW FLUO MATTE YL

Part Number: MXA-S2730

Not Yet Reviewed

Estimated Ship Date: May 5, 2026 if ordered today

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Estimated Ship Date: May 5, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8301825-9510-YS

SM3 YOUTH RADIUM HELMET GRY/BLK/YLW FLUO MATTE YS

Part Number: MXA-S2732

Not Yet Reviewed

Estimated Ship Date: May 6, 2026 if ordered today

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Estimated Ship Date: May 6, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8302025-7312-YM

Helmet, SM3 Youth, Full Face, Comfort Liner, Wurx Blue/Red/White/Black Graphic, Gloss, DOT/ECE, Youth Medium, Each

Part Number: MXA-S2737

Not Yet Reviewed

Estimated Ship Date: May 6, 2026 if ordered today

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Estimated Ship Date: May 6, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8302225-110-YS

Helmet, SM3 Youth, Full Face, Comfort Liner, Matte Black, DOT/ECE, Youth Small, Each

Part Number: MXA-8302225110YS

Not Yet Reviewed

Estimated Ship Date: May 5, 2026 if ordered today

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Estimated Ship Date: May 5, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8303226-9277-YM

Helmet, SM3 Youth, Full Face, Comfort Liner, Jettson Gray/Purple/Black Graphic, Gloss, DOT/ECE, Youth Medium, Each

Part Number: MXA-S3142

Not Yet Reviewed

Estimated Ship Date: May 5, 2026 if ordered today

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Estimated Ship Date: May 5, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8302025-1574-YM

SM3 YOUTH WURX HELMET BLK/YLW FLUO/BLUE/RED YM

Part Number: MXA-S2734

Not Yet Reviewed

Estimated Ship Date: May 5, 2026 if ordered today

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Estimated Ship Date: May 5, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8301825-9510-YM

Helmet, SM3 Youth, Full Face, Comfort Liner, Radium Gray/Black/Yellow Fluorescent Graphic, Matte, DOT/ECE, Youth Medium, Each

Part Number: MXA-S2731

Not Yet Reviewed

Estimated Ship Date: May 6, 2026 if ordered today

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Estimated Ship Date: May 6, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8302025-1574-YL

Helmet, SM3 Youth, Full Face, Comfort Liner, Wurx Black/Yellow Fluorescent/Blue/Red Graphic, Gloss, DOT/ECE, Youth Large, Each

Part Number: MXA-S2733

Not Yet Reviewed

Estimated Ship Date: May 6, 2026 if ordered today

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Estimated Ship Date: May 6, 2026 if ordered today

Alpinestars MX SM3 Youth Helmets 8301625-3051-YL

Helmet, SM3 Youth, Full Face, Comfort Liner, Fray Red/Yellow Fluorescent/Black Graphic, Gloss, DOT/ECE, Youth Large, Each

Part Number: MXA-S2724

Not Yet Reviewed

Estimated Ship Date: May 6, 2026 if ordered today

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Estimated Ship Date: May 6, 2026 if ordered today

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