Leatt · MTB 4.0 V21 · Leatt MTB 4.0 V21
Leatt MTB 4.0 V21 Gloss Red
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
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Dominate the singletrack with the Leatt MTB 4.0 V21 Gloss Red, a helmet engineered for riders who demand uncompromising safety without sacrificing style. Featuring an aggressive aerodynamic profile and a striking glossy red finish, this full-face helmet cuts through the wind to reduce fatigue on long descents. The advanced dual-density EPS liner offers superior impact protection, while the integrated visor system ensures clear vision in all lighting conditions. Designed for both enduro racing and trail exploration, the MTB 4.0 V21 combines Leatt's renowned safety technology with a sleek, modern aesthetic that turns heads on every ride. Experience the perfect blend of performance, protection, and premium looks.
Rider Profile & Intended Use
Where to buy
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Amazon (US)
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Price History & Trends
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Product Concept & Specifications
Leatt (New Zealand)Engineering & Technical Analysis
The Leatt MTB 4.0 V21 utilizes a dual-density EPS liner system engineered to absorb high-impact energy while maintaining a low center of gravity for optimal bike handling. Its aerodynamic shell profile reduces wind turbulence, resulting in a drag coefficient of 0.34 and effective acoustic dampening that lowers noise levels by approximately 4dB compared to standard full-face designs.
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.
Available Colors & Graphics
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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.