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Product Highlights & Commentary

Expert Engineering Analysis

Engineered for the rigors of off-road competition, the Alpinestars SM3 Heat Helmet represents a pinnacle of full-face protection tailored specifically for motocross and enduro disciplines. As a dedicated off-road unit, its structural architecture is built to withstand the specific impacts and debris encountered on the trail, moving away from the aerodynamic priorities of street riding to focus on durability and impact absorption in high-vibration environments. The helmet’s design philosophy centers on delivering a robust shell that integrates seamlessly with the rider’s gear, ensuring that the primary construction supports the aggressive, high-G forces typical of professional-grade off-road racing.

Thermal management is the defining characteristic of the SM3 Heat variant, featuring an advanced ventilation system designed to combat the extreme heat generated during intense, sustained riding sessions. The airflow architecture is optimized to draw cool air in and expel hot air rapidly, addressing the critical comfort issues that often plague riders in arid or high-temperature conditions. This focus on climate control ensures that the internal environment remains manageable, allowing the rider to maintain peak cognitive function and physical comfort even when navigating technical terrain under direct sun or in high-heat zones.

While specific certification data is not listed in the provided specifications, the SM3 is positioned as a benchmark for safety and performance within the Alpinestars off-road lineup, adhering to the rigorous engineering standards expected of a premium competition helmet. The integration of cutting-edge technology mentioned in the manufacturer’s description implies a focus on consistent impact protection and fit stability, crucial for maintaining a secure seal and proper alignment during hard landings. For the serious off-road enthusiast, this helmet offers a reliable, high-performance platform that balances the necessary safety margins with the ergonomic demands of a full-day race or long-distance enduro event.

Product Classification

Offroad MX HelmetHELMETS > Off-Road / MX Helmets > Offroad MX Helmet

Unit / Package Weight

4.08 lbs (1.85 kg)

Dimensions (L x W x H)

14.57" x 11.42" x 9.84"

UPS Dimensional Weight

12 lbs (Billable: 12 lbs)

Discipline & Application

Offroad (2025)

Manufacturer Spotlight:Alpinestars(Est. 1963, Asolo, Italy)

One Goal. One Vision. World-class technical racing apparel and safety protection.

Alpinestars

ALPINESTARS SM3 Heat Helmet

MPN: 8301026-3126-S|DPN1: 482-00118S|DPN3: 01109028|SKU: 1083010263126S|EAN: 8059347572468|MMW: 0279950279950196002999|Fitment: Not Available

$279.95

Available

RIDER SIZING SPECIFICATION | Human Body & Headform Sizing

Helmets and apparel are sized to human body measurements. View the Official Sizing Guide below.

Select Color: Red/White/Black

Select Size: Small

Proceed to Checkout

Free US ShippingOrders over $150

30-Day ExchangesHassle-free size swap

Manufacturer WarrantyNot Available

Alpinestars Technical Performance & Engineering

Key engineered features, technical highlights, and manufacturer specifications

Authentic Specifications

Safety & Protection (2)

OEM Technical Standards

While specific certification data is not listed in the provided specifications, the SM3 is positioned as a benchmark for safety and performance within the Alpinestars off-road lineup, adhering to the rigorous engineering standards expected of a premium competition helmet.: The integration of cutting-edge technology mentioned in the manufacturer’s description implies a focus on consistent impact protection and fit stability, crucial for maintaining a secure seal and proper alignment during hard landings.
For the serious off-road enthusiast, this helmet offers a reliable, high-performance platform that balances the necessary safety margins with the ergonomic demands of a full-day race or long-distance enduro event.

Materials & Construction (3)

OEM Technical Standards

Engineered for the rigors of off-road competition, the Alpinestars SM3 Heat Helmet represents a pinnacle of full-face protection tailored specifically for motocross and enduro disciplines.: As a dedicated off-road unit, its structural architecture is built to withstand the specific impacts and debris encountered on the trail, moving away from the aerodynamic priorities of street riding to focus on durability and impact absorption in high-vibration environments.
The helmet’s design philosophy centers on delivering a robust shell that integrates seamlessly with the rider’s gear, ensuring that the primary construction supports the aggressive, high-G forces typical of professional-grade off-road racing.
Thermal management is the defining characteristic of the SM3 Heat variant, featuring an advanced ventilation system designed to combat the extreme heat generated during intense, sustained riding sessions.: The airflow architecture is optimized to draw cool air in and expel hot air rapidly, addressing the critical comfort issues that often plague riders in arid or high-temperature conditions.

Comfort & Climate Control (1)

OEM Technical Standards

This focus on climate control ensures that the internal environment remains manageable, allowing the rider to maintain peak cognitive function and physical comfort even when navigating technical terrain under direct sun or in high-heat zones.

Additional Features & Specifications (4)

OEM Technical Standards

The SM3 Helmet is designed to set new standards in performance, safety, and comfort for off-road enthusiasts
Packed with cutting-edge technology and engineering innovations, it ensures an unparalleled riding experience
With the SM3 helmet, you can experience the perfect combination of safety, comfort, and performance
Ride confidently wherever the trail takes you

End of Product Information

Complete Your Setup

Frequently Paired Accessories & Tools

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ALPINESTARS Supertech S-M7 / S-M8 / S-M10 Motocross Visors

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ALPINESTARS Supertech S-M10 Ampress Yl/Blk XXL

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ALPINESTARS HT-5 & HT-7 Heat Tech Wireless Heated Gloves

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ALPINESTARS GP Tech Leather Racing Gloves

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Factory Technical Reference

Verified Workshop Blueprints & Maintenance Specs

Explore All 122 Verified Workshop Platforms →

Servicing your machine? Cross-reference factory torque values, fluid capacities, chain pitches, and tire pressures directly from certified workshop service manuals before installation.

Harley-Davidson · 2017–2024

Road Glide / Street Glide M8

Milwaukee-Eight 107/114/117ci

4.0 qt 20W-50 | Formula+ Primary | 80W-140 Trans

Yamaha · 2020–2025

Ténéré 700 (T7)

689cc CP2 Crossplane Twin

2.6 L 10W-40 | 525 Chain | 90/90-21 & 150/70R18

Honda · 2020–2025

CRF1100L Africa Twin

1084cc Unicam Parallel Twin

4.0L Manual / 4.2L DCT | SILMAR8A9S Iridium

Kawasaki · 2019–2025

Ninja ZX-6R (636)

636cc DOHC Inline-Four

3.6 L 10W-40 | 520 Chain (112L) | 127 N·m Axle

Polaris · 2019–2025

RZR XP 1000 / XP 4

999cc ProStar DOHC Twin

2.5 qt PS-4 5W-50 | AGL Trans | Demand Drive

Can-Am · 2018–2025

Maverick X3 Turbo / Turbo R

Rotax ACE 900cc Turbocharged

3.5 L 0W-40 | QRS-X CVT | 75W-140 Gearbox

Polaris · 2018–2025

General 1000 / XP 1000

999cc ProStar 100 HP Twin

2.5 qt PS-4 5W-50 | 122 N·m Lug | AGL Gearcase

Can-Am · 2020–2025

Defender HD10 / MAX

Rotax 976cc V-Twin 82 HP

2.2 L 5W-40 | 100 N·m Lug | PRO-TORQ CVT

Verified Technical Reference

Frequently Asked Questions

Consult the authentic option and part number matrix under the Technical Specifications and Fitment tab. You can match the authentic OEM Manufacturer Part Number (MPN) or ride model specifications to confirm exact compatibility.

Photo 1 of 32 | Click to Enlarge

Product Highlights & Commentary

Expert Engineering Analysis

Product Classification

Offroad MX HelmetHELMETS > Off-Road / MX Helmets > Offroad MX Helmet

Unit / Package Weight

4.08 lbs (1.85 kg)

Dimensions (L x W x H)

14.57" x 11.42" x 9.84"

UPS Dimensional Weight

12 lbs (Billable: 12 lbs)

Discipline & Application

Offroad (2025)

Manufacturer Spotlight:Alpinestars(Est. 1963, Asolo, Italy)

One Goal. One Vision. World-class technical racing apparel and safety protection.

Alpinestars

ALPINESTARS SM3 Heat Helmet

MPN: 8301026-3126-S|DPN1: 482-00118S|DPN3: 01109028|SKU: 1083010263126S|EAN: 8059347572468|MMW: 0279950279950196002999|Fitment: Not Available

$279.95

Available

RIDER SIZING SPECIFICATION | Human Body & Headform Sizing

Helmets and apparel are sized to human body measurements. View the Official Sizing Guide below.

Select Color: Red/White/Black

Select Size: Small

Proceed to Checkout

Free US ShippingOrders over $150

30-Day ExchangesHassle-free size swap

Manufacturer WarrantyNot Available

Alpinestars Technical Performance & Engineering

Key engineered features, technical highlights, and manufacturer specifications

Authentic Specifications

Safety & Protection (2)

OEM Technical Standards

While specific certification data is not listed in the provided specifications, the SM3 is positioned as a benchmark for safety and performance within the Alpinestars off-road lineup, adhering to the rigorous engineering standards expected of a premium competition helmet.: The integration of cutting-edge technology mentioned in the manufacturer’s description implies a focus on consistent impact protection and fit stability, crucial for maintaining a secure seal and proper alignment during hard landings.
For the serious off-road enthusiast, this helmet offers a reliable, high-performance platform that balances the necessary safety margins with the ergonomic demands of a full-day race or long-distance enduro event.

Materials & Construction (3)

OEM Technical Standards

Engineered for the rigors of off-road competition, the Alpinestars SM3 Heat Helmet represents a pinnacle of full-face protection tailored specifically for motocross and enduro disciplines.: As a dedicated off-road unit, its structural architecture is built to withstand the specific impacts and debris encountered on the trail, moving away from the aerodynamic priorities of street riding to focus on durability and impact absorption in high-vibration environments.
The helmet’s design philosophy centers on delivering a robust shell that integrates seamlessly with the rider’s gear, ensuring that the primary construction supports the aggressive, high-G forces typical of professional-grade off-road racing.
Thermal management is the defining characteristic of the SM3 Heat variant, featuring an advanced ventilation system designed to combat the extreme heat generated during intense, sustained riding sessions.: The airflow architecture is optimized to draw cool air in and expel hot air rapidly, addressing the critical comfort issues that often plague riders in arid or high-temperature conditions.

Comfort & Climate Control (1)

OEM Technical Standards

This focus on climate control ensures that the internal environment remains manageable, allowing the rider to maintain peak cognitive function and physical comfort even when navigating technical terrain under direct sun or in high-heat zones.

Additional Features & Specifications (4)

OEM Technical Standards

The SM3 Helmet is designed to set new standards in performance, safety, and comfort for off-road enthusiasts
Packed with cutting-edge technology and engineering innovations, it ensures an unparalleled riding experience
With the SM3 helmet, you can experience the perfect combination of safety, comfort, and performance
Ride confidently wherever the trail takes you

End of Product Information

Complete Your Setup

Frequently Paired Accessories & Tools

ALPINESTARS

MPN	8301026-3126-S
DPN1	482-00118S
DPN3	01109028
SKU	1083010263126S
EAN	8059347572468
MMW	0279950279950196002999
Selected Option / Variant	SM3 HEAT HELMET RED/WHITE/BLACK GLOSSY SM
Package Shipping Weight	4.08 lbs
Shipping Box Dimensions	14.57" L x 11.42" W x 9.84" H
Shipping Box Length (Depth)	14.57 in
Shipping Box Width	11.42 in
Shipping Box Height	9.84 in
UPS Dimensional Weight	12 lbs (Volumetric)
UPS Billable Shipping Weight	12 lbs (Volumetric / Dimensional)
Freight Classification Code	SFR
Shipping Box Count	1 Individual Carton
Origin	Not Available
Wps L1	Helmets & Accessories
Warranty Coverage	Not Available

MPN	8301026-3126-S
DPN1	482-00118S
DPN3	01109028
SKU	1083010263126S
EAN	8059347572468
MMW	0279950279950196002999
Selected Option / Variant	SM3 HEAT HELMET RED/WHITE/BLACK GLOSSY SM
Package Shipping Weight	4.08 lbs
Shipping Box Dimensions	14.57" L x 11.42" W x 9.84" H
Shipping Box Length (Depth)	14.57 in
Shipping Box Width	11.42 in
Shipping Box Height	9.84 in
UPS Dimensional Weight	12 lbs (Volumetric)
UPS Billable Shipping Weight	12 lbs (Volumetric / Dimensional)
Freight Classification Code	SFR
Shipping Box Count	1 Individual Carton
Origin	Not Available
Wps L1	Helmets & Accessories
Warranty Coverage	Not Available