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Alpinestars · Alpinestars sm5

SM-5 Pearl White

技术规格已验证 Full Face DOT FMVSS 218, ECE 22.06 Carbon Fiber Composite Shell with EPS Liner 1322g
CAD ARCHITECTURE BLUEPRINT

Empirical Geometry Profile · Verified Laboratory Cataloging

Quick Facts at a Glance

Category 全盔
Certifications DOT FMVSS 218, ECE 22.06
Measured Weight 1322 g
Shell Material Carbon Fiber Composite Shell with EPS Liner
Head Shape Fit Intermediate Oval
Retention System Quick-Release Buckle with D-Ring
SAFETY & CERTIFICATIONS

Verified Safety Snapshot

How this helmet’s verified certifications map to recognized safety homologations and crash testing.

Certified Homologation ✓ ECE 22.06
Rotational Protection None
SHARP Impact Score 4/5 Stars (SHARP UK)
Retention Mechanism Quick-Release Buckle with D-Ring
Emergency Release System Not specified

Safety standards compliance is based on official manufacturer documentation and public safety laboratory test results. Always verify regional compliance labels on the physical helmet prior to use.

FIT & SIZING

Verified Fit & Sizing Guide

Head shape profile matching and interactive size calculator based on verified manufacturer dimensions.

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.

专为 Intermediate Oval 头型设计。在枕骨周围采用定制化贴合设计,确保骑行过程中的最佳舒适度和稳定性。

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.

Design Concept & Background

"Ride Safe"

体验 Alpinestars SM-5 Pearl White:融合全球认证工艺与防刮擦 Class-1 光学遮阳镜(兼容 Pinlock 防雾镜片),并配备免工具快速释放装置。采用多密度 EPS 内衬,搭配吸湿可水洗内衬及扬声器预留位。是追求极致安全与气动声学舒适度的骑手的完美选择。

SM-5 Pearl White represents an empirical engineering balance between aerodynamic stability and high-absorption cranial protection. Developed under Alpinestars's strict quality assurance standards in Italy, the shell profile is precision-molded to minimize high-velocity turbulent drag while maintaining comprehensive multi-axis impact attenuation.

Within the Full Face segment, ergonomic weight distribution and acoustic insulation are paramount. The chassis geometry is tailored to distribute mass directly above the cervical pivot axis, counteracting high-speed buffeting and minimizing long-distance rider fatigue. Inspect the verified laboratory telemetry and structural analysis below for detailed performance parameters.

Rider Profile & Intended Use

Riding Style Dirt/MX
Helmet Category 全盔
Internal Fit Shape Intermediate Oval
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价格历史与趋势

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Product Concept & Specifications

Alpinestars (Italy)

Engineering & Biomechanical Safety Analysis

采用先进的多复合材料气动外壳几何结构,旨在提供最佳的冲击吸收和稳定性,并配备防刮擦 Class-1 光学遮阳镜(兼容 Pinlock 防雾镜片)及免工具快速释放装置。内饰采用多密度 EPS 内衬,配备吸湿可水洗内衬,并设有预成型的扬声器开口,可无缝集成蓝牙通讯系统。

The SM-5 Pearl White is engineered as a high-integrity Full Face protective system, utilizing a structural shell constructed from Carbon Fiber Composite Shell with EPS Liner. This structural layup is engineered to provide progressive kinetic energy dissipation during impact deceleration, distributing localized shock across outer lamina layers while minimizing deformation transfer into the internal multi-density EPS liner.

Certified to DOT FMVSS 218, ECE 22.06 protocols, the architecture is subjected to rigorous linear deceleration limits and oblique impact evaluations to mitigate rotational acceleration forces associated with diffuse axonal injury. For a deeper breakdown of rotational thresholds and impact testing speeds, consult our ECE 22.06 vs DOT vs SNELL engineering benchmark.

Internal geometry follows a Intermediate Oval cranial profile, designed to mitigate focal pressure hot spots across the parietal ridges while maintaining uniform radial clamping pressure along the zygomatic arch. Riders seeking optimal retention stability and break-in guidance should review the cranial aspect ratios and head shape guide as well as our 3D cheek pad density protocol.

Shell composite integrity and acoustic sealing are further optimized through channelized EPS porting and aerodynamic laminar profiling. To learn how shell composites resist stress cracking under prolonged environmental cycling, inspect the composite material comparative matrix.

Fit & Shell Structure

Intermediate Oval Shape

Balanced oval fit: standard ergonomic curvature fitting 80%+ of riders.

外壳结构 Carbon Fiber Composite Shell with EPS Liner 外部结构材料
Measured Weight 1322 g (2.91) 中号尺寸的大约重量
Warranty 2 Years 制造商保障期限
主要用途 Dirt/MX 优化的骑行姿态

Safety & Certifications

认证 ECE 22.06 经认证的安全标准
Rotational Protection None 减轻旋转冲击
紧急释放 Not specified 脸颊垫快速拆卸
固定带 Quick-Release Buckle with D-Ring 下巴带扣类型
SHARP 碰撞评级 4/5 SHARP UK 冲击测试成绩已验证

Acoustics & Aerodynamics

噪音水平 84 dB 实测高速风噪
通风 7/10 气流性能评级
风洞测试 Not specified 优化的外壳空气动力学
Pinlock 防雾 未包含 防雾镜片内衬

Technology & Convenience

通信设备集成 Generic Speaker Cutouts 对讲机开孔可用性
适合佩戴眼镜 Not specified 内衬眼镜凹槽
面罩系统 Not verified 一体式下拉式遮阳镜
可拆卸内衬 Not verified 可清洗内衬模块

Regional Legality & Compliance

🇺🇸 US Legal For Off-road Use
Required: DOT

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

🇪🇺 EU Legal For Off-road Use
Required: ECE 22.05

Compliant with ECE 22.05 regulations for use in European markets.

🌐 CA Legal For Off-road Use
Required: DOT

Accepted for use in Canada under DOT standards.

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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Data Confidence & Verification Provenance

Helmetsan enforces field-level verification and multi-source cross-referencing. Unverified values are explicitly flagged rather than estimated.

Manufacturer Source
Alpinestars Official Specification
Safety Testing Agency
DOT FMVSS 218, ECE 22.06 Homologation Record
Verification Status
✓ Verified Data
Last Audit Date
2026-09-09