Leatt · MTB 4.0 V21
莱特MTB 4.0 V21 碳纤维
Quick Facts at a Glance
Verified Safety Snapshot
How this helmet’s verified certifications map to recognized safety homologations and crash testing.
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.
Verified Fit & Sizing Guide
Head shape profile matching and interactive size calculator based on verified manufacturer dimensions.
Leatt MTB 4.0 V21 is a full-face helmet designed for mountain biking with an extended rear coverage for better protection against impacts from above and behind.
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"
征服山径,Leatt MTB 4.0 V21 Carbon 碳纤维全盔引领前沿安全与强悍气动设计。采用高模量碳纤维打造,全盔强度与重量比无与伦比,让你脚下更轻盈,却丝毫不降低防护等级。集成 MIPS 系统可有效抵御旋转冲击——在技术性下坡骑行中常见的伤害模式。优化通风系统带来卓越气流,即使最激烈的下坡过程中也能保持凉爽。简约现代的外观与高端工艺,这不仅是装备,更是性能的宣言。信赖 Leatt,突破头盔科技边界,为你保驾护航,让你全力征服最陡峭的路线。
莱特MTB 4.0 V21 碳纤维 represents an empirical engineering balance between aerodynamic stability and high-absorption cranial protection. Developed under Leatt's strict quality assurance standards in New Zealand, 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
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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
利用特密多密度EPS衬垫和集成MIPS(多向冲击防护系统)减轻斜向冲击时的旋转力。其碳纤维复合材质外壳相比传统玻璃纤维具有更优的刚度重量比,在降低整体重量的同时保持了对冲击能量的吸收能力。
The 莱特MTB 4.0 V21 碳纤维 is engineered as a high-integrity Full Face protective system, utilizing a structural shell constructed from Carbon Fiber. 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.
Safety & Certifications
Acoustics & Aerodynamics
Technology & Convenience
Interactive Size & Fit Finder
Leatt MTB 4.0 V21 is a full-face helmet designed for mountain biking with an extended rear coverage for better protection against impacts from above and behind.
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.
View on retailers
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Compatible Motorcycles for the 莱特MTB 4.0 V21 碳纤维
Optimized for aggressive street carving, neutral forward-leaning stances, and high-efficiency brow airflow.
Data Confidence & Verification Provenance
Helmetsan enforces field-level verification and multi-source cross-referencing. Unverified values are explicitly flagged rather than estimated.