Global Helmet Intelligence Platform

Alpinestars · SM5

阿尔派斯特拉斯 SM5 珍珠白

DOT, ECE 22.05

Design Story & Interactive HUD

Alpinestars (Italy)

The Narrative

征服赛道与崎岖小径,Alpinestars SM5头盔采用醒目的珍珠白配色,为追求无与伦比性能与时尚风格的骑手打造。这款专为越野设计的头盔拥有强悍的气动外形,切割气流,降低阻力并减少风噪,助您在激烈的越野骑行中保持专注。内衬采用速干面料与可调节EPS衬垫,为您提供贴合头型的稳固、赛道级别的舒适佩戴体验。坚固的结构符合严格的安全标准,让您在崎岖地形中挑战极限时无后顾之忧。无论是在技术单车道穿梭还是封闭赛道竞速,头盔通过精准的进气与排气口设计,即使在高温环境下也能保持清凉。以融合前沿科技

Technical Analysis

SM5采用阿尔派纳斯塔斯(Alpinestars)自主的EPS衬里结构体系,采用多密度泡沫构建,以优化下颚和颞部区域的冲击吸收。其空气动力学外壳几何形状被设计以在高速时管理空气流动的紊流,同时在侧向G力下维持结构刚性,典型的摩托车越野竞赛。

Feature Highlights

MIPS impact protection system High-impact polymer shell Intermediate oval head shape Advanced ventilation system Emergency release cheek pads Multi-density EPS liner Removable and washable interior
Homologation ECE 22.06 Certified safety standard
Rotational Protection None Mitigates rotational impact
Emergency Release Not Equipped Cheek pad quick removal
Retention Strap Double D-Ring Chin strap buckle style
Acoustics Quietness 92 dB

Extremely Quiet: Superior long-distance sound damping.

Ventilation Flow 8/10

High Flow: Dynamic multi-channel active venting.

Wind Tunnel Tested No Optimized shell aerodynamics
Pinlock Tech Not Included Anti-fog shield insertion
Comms Integration Generic Speaker Cutouts Intercom cutout availability
Glasses Friendly No Inner lining eyewear grooves
Visor Shield Tech Single Visor Integrated drop-down sun visor
Removable Interior Partial / Fixed Washable lining modules

Intermediate Oval Shape

Intermediate oval fit, the standard ergonomic profile suited for the majority of riders.

Shell Construction Polymer Outer structural material
Measured Weight 1350g (2.98) Approximate medium size weight
Warranty 2 Manufacturer coverage duration
Primary Use Case Dirt/MX Optimized riding orientation
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Where to buy

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Certified Alpinestars Stores in US

Price History

Interactive Size & Fit Finder

Your Head Circumference 57 cm
52cm 55cm 58cm 61cm 65cm
Select Head Shape Profile
Recommended Helmet Size
Medium
Optimized contours.
Perfect for standard intermediate head profiles.

Alpinestars SM5 is a motocross/dirt helmet designed for off-road use; it does not feature integrated speakers, cable management ports, or HUD compatibility.

How to measure

Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, and repeat for consistency.

Regional Legality Guidance

US

Status: Legal for Off-Road Use

Required: DOT

Certified for use in the United States; meets DOT FMVSS 218 standards.

EU

Status: Legal for Off-Road Use

Required: ECE 22.05

Compliant with ECE 22.05 regulations for use in European markets.

CA

Status: Legal for Off-Road Use

Required: DOT

Accepted for use in Canada under DOT standards.

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