MT Helmets · MTB 4.0 V21
Leatt MTB 4.0 V21 Carbon
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
"Born for Speed"
Domina el sendero con el Leatt MTB 4.0 V21 Carbon, donde la seguridad de vanguardia se une a una aerodinámica agresiva. Fabricado con fibra de carbono de alto módulo, este casco integral ofrece una relación resistencia-peso inigualable, garantizando ligereza sin comprometer la protección. El sistema MIPS integrado proporciona una defensa crítica contra los impactos rotacionales, un escenario común en el descenso técnico. Experimenta un flujo de aire superior gracias al sistema de ventilación optimizado, manteniéndote fresco incluso durante los descensos más intensos. Con su estética moderna y elegante y un acabado premium, no es solo equipo; es una declaración de rendimiento. Confía en Leatt para superar los límites de la tecnología de cascos, ofreciéndote tranquilidad para que puedas concentrarte en conquistar las líneas más empinadas.
Rider Profile & Intended Use
Où acheter
| Revendeur | Prix | Availability | |
|---|---|---|---|
| Amazon (US) | Voir le prix en temps réel | Voir sur le site | Voir le prix → |
Historique et tendances des prix
ℹ️ Helmetsan est un moteur indépendant de sécurité et d’aide à la décision pour les motos. Lorsque vous consultez des prix ou achetez via des liens de revendeurs, Helmetsan peut percevoir une commission d’affiliation, sans frais supplémentaires pour vous.
Product Concept & Specifications
MT Helmets (Spain)Engineering & Biomechanical Safety Analysis
El Leatt MTB 4.0 V21 Carbon utiliza un forro de EPS de densidad múltiple y un sistema MIPS (Multi-directional Impact Protection System) integrado para mitigar las fuerzas de rotación durante los impactos oblicuos. Su carcasa de compuesto de fibra de carbono ofrece relaciones de rigidez-peso superiores en comparación con la fibra de vidrio tradicional, reduciendo la masa total mientras mantiene la capacidad de absorción de energía en caso de colisión.
The Leatt MTB 4.0 V21 Carbon 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 ECE 22.05, DOT 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
This helmet is linked to product pages on the following retailers. Links can be used for affiliate and as a source for data and images.
Compare & buy
Add this helmet to the comparison tool to see it side by side with others, or check current offers from trusted retailers.
User Reviews
Be the first to share your riding experience with this helmet.
Share your experience
No reviews yet. Be the first to share your experience with this helmet!
More from MT Helmets
MT Helmets District SV Blanc brillant
MT Helmets District SV Flow TC-2
MT Helmets Falcon Hi-Viz Yellow
MT Helmets Falcon Track TC-2
MT Helmets District SV Noir mat
MT Helmets District SV Argent métallisé
Compatible Motorcycles for the Leatt MTB 4.0 V21 Carbon
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.