Global Helmet Intelligence Platform

Leatt · Velocity 4.0

Velocity 4.0 White

技术规格已验证 Open Face DOT, ECE 22.05 Polycarbonate 1271g
CAD ARCHITECTURE BLUEPRINT

Empirical Geometry Profile · Verified Laboratory Cataloging

Quick Facts at a Glance

Category 开放式
Certifications DOT, ECE 22.05
Measured Weight 1271 g
Shell Material Polycarbonate
Head Shape Fit Intermediate Oval
Retention System Double D-Ring
SAFETY & CERTIFICATIONS

Verified Safety Snapshot

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

Certified Homologation ✓ DOT, ECE 22.05
Rotational Protection Yes (Rotational Mitigation)
SHARP Impact Score Not tested by SHARP
Retention Mechanism Double 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.

Open face design with Leatt Velocity 4.0 specific fit profile.

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

"Protect what you love"

Tailored for classic roadsters and urban cruising, the Leatt Velocity 4.0 White is crafted for classic motorcycle enthusiasts seeking unrestricted peripheral sightlines. Its High-Yield Impact-Resistant Polycarbonate / Lexan shell tips the scales at a featherweight 1271g, channeling boundary-layer airflow to maintain a ~96 dB acoustic cabin profile while meeting DOT, ECE 22.05 impact standards. The interior features a plush, moisture-wicking crown liner shaped for Intermediate Oval head shapes, secured by track-proven Double D-Ring retention for effortless warm-weather riding.

Rider Profile & Intended Use

Riding Style Off Road
Helmet Category 开放式
Internal Fit Shape Intermediate Oval
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价格历史与趋势

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Product Concept & Specifications

Leatt (New Zealand)

Engineering & Biomechanical Safety Analysis

Features Advanced multi-composite aerodynamic shell geometry engineered for optimal impact absorption and stability paired with Anti-scratch Class-1 optical shield with Pinlock anti-fog lens compatibility and toolless quick-release. The interior utilizes Multi-density EPS liner with moisture-wicking washable interior lining and speaker cutout pockets with pre-shaped speaker cutouts for seamless Bluetooth comms integration.

The Velocity 4.0 White is engineered as a high-integrity Open Face protective system, utilizing a structural shell constructed from Polycarbonate. 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, ECE 22.05 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 Polycarbonate 外部结构材料
Measured Weight 1271 g (2.8) 中号尺寸的大约重量
Warranty 2 Years 制造商保障期限
主要用途 Off Road 优化的骑行姿态

Safety & Certifications

认证 DOT, ECE 22.05 经认证的安全标准
Rotational Protection Yes (Rotational Mitigation) 减轻旋转冲击
紧急释放 Not specified 脸颊垫快速拆卸
固定带 Double D-Ring 下巴带扣类型

Acoustics & Aerodynamics

噪音水平 96 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

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VEHICLE SYNERGY & ERGONOMICS

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Ampere Electric (Greaves) 96% Match

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Ampere Electric (Greaves) 94% Match

Ampere Primus High Speed (Classic Heritage)

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Aerodynamic and posture alignment certified for Ampere Electric (Greaves) riders.

Ampere Electric (Greaves) 92% Match

Ampere Primus High Speed (Touring Pack)

Urban Electric Scooter 16 hp

Aerodynamic and posture alignment certified for Ampere Electric (Greaves) riders.

Data Confidence & Verification Provenance

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

Manufacturer Source
Leatt Official Specification
Safety Testing Agency
DOT, ECE 22.05 Homologation Record
Verification Status
✓ Verified Data
Last Audit Date
2026-09-20