Alpinestars MX SM3 Helmets

Not Yet Reviewed

Engineered for Enduro, MX, and off-road riding, the Alpinestars MX SM3 helmets integrates advanced technologies and innovations designed to enhance ease of use, com

Engineered for Enduro, MX, and off-road riding, the Alpinestars MX SM3 helmets integrates advanced technologies and innovations designed to enhance ease of use, comfort, and most importantly impact protection. With an advanced shell construction, the SM3 helmets feature 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 lightweight. Maximized ventilation and high levels of heat transfer exchange, thanks to 10 inlets and seven exhaust ports. Alpinestars patented low-friction coating is applied to the inner part of the main EPS liner to reduce the rotational acceleration forces that can result from certain oblique impacts. This layer essentially acts as a slip plane to mimic the brain's own low-friction cerebrospinal fluid, which is the body's natural defense against oblique impacts. 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. The SM3 helmets are available in a range of sizes and color options. Order the helmet in size you'd prefer.

Key features:

* The SM3 helmet conforms to both DOT certification and ECE 2206 homologation for use worldwide
* 5 EPS inner parts with 4 densities to effectively manage volume and impact performance
* Removeable comfort liner is constructed using recycled materials for a lower carbon footprint
* The inner and outer surfaces are engineered to minimize the effects of oblique impacts
* The fit can be tailored to the rider's head, thanks to the helmet's crown and cheek pads, which are available as genuine spare parts in different thicknesses
* Hydration tube channels are integrated into the helmet's cheek pads for convenience and performance
* 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
* Soft textile chin strap is 25mm for optimal safety and rider comfort
* Stainless steel D-rings ensure a tight and secure fit

Showing In Stock Items. Show All 59 Items.

Results 1 - 25 of 34

Alpinestars MX SM3 Helmets 8300326-1180-XL

Helmet, SM3, Full Face, Comfort Liner, Gloss Black, DOT/ECE, X-Large, Each

Part Number: MXA-S3042

Not Yet Reviewed

Estimated Ship Date: Mar 6, 2026 if ordered today

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Estimated Ship Date: Mar 6, 2026 if ordered today

Alpinestars MX SM3 Helmets 8300326-110-S

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

Part Number: MXA-8300326110S

Not Yet Reviewed

Estimated Ship Date: Mar 4, 2026 if ordered today

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Estimated Ship Date: Mar 4, 2026 if ordered today

Alpinestars MX SM3 Helmets 8300326-110-XL

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

Part Number: MXA-8300326110XL

Not Yet Reviewed

Estimated Ship Date: Mar 4, 2026 if ordered today

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Estimated Ship Date: Mar 4, 2026 if ordered today

Alpinestars MX SM3 Helmets 8300326-2180-L

Helmet, SM3, Full Face, Comfort Liner, Gloss White, DOT/ECE, Large, Each

Part Number: MXA-83003262180L

Not Yet Reviewed

Estimated Ship Date: Mar 4, 2026 if ordered today

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Estimated Ship Date: Mar 4, 2026 if ordered today

Alpinestars MX SM3 Helmets 8300826-1546-S

SM3 RADIUM HELMET BLK/WHT/GRY GLOSSY SM

Part Number: MXA-83008261546S

Not Yet Reviewed

Estimated Ship Date: Mar 4, 2026 if ordered today

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Estimated Ship Date: Mar 4, 2026 if ordered today

Alpinestars MX SM3 Helmets 8300826-9510-L

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

Part Number: MXA-83008269510L

Not Yet Reviewed

Estimated Ship Date: Mar 4, 2026 if ordered today

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Estimated Ship Date: Mar 4, 2026 if ordered today

Alpinestars MX SM3 Helmets 8301026-3126-S

Helmet, SM3, Full Face, Comfort Liner, Heat Red/White/Black Graphic, Gloss, DOT/ECE, Small, Each

Part Number: MXA-83010263126S

Not Yet Reviewed

Estimated Ship Date: Mar 4, 2026 if ordered today

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Estimated Ship Date: Mar 4, 2026 if ordered today