Leatt · MTB 4.0 V21 · Leatt MTB 4.0 V21
Leatt MTB 4.0 V21 Matte Black
DOT, ECE 22.05
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About the Leatt MTB 4.0 V21 Matte Black
Full FaceConquer rugged trails with the Leatt MTB 4.0 V21, a full-face helmet engineered for speed and safety without compromising breathability. Crafted from high-impact composite materials, this matte black masterpiece offers an aggressive, aerodynamic profile that slices through the air, reducing drag while keeping you cool on long descents. The advanced ventilation system ensures optimal airflow, preventing overheating during intense climbs or technical sections. With a secure fit and superior impact absorption technology, it delivers peace of mind when pushing your limits. Whether you are racing downhill or exploring remote singletrack, the MTB 4.0 V21 combines cutting-edge protection with a sleek, modern aesthetic that turns heads on every ride.
Technical Analysis
The Leatt MTB 4.0 V21 utilizes a multi-density EPS liner architecture designed to manage rotational impact forces specific to mountain biking dynamics. Its aerodynamic shell geometry minimizes wind shear while maintaining structural rigidity through carbon fiber reinforcement in critical zones.
Safety & Aero-Acoustics HUD
SHARP impact test results pending.
Extremely Quiet: Superior long-distance sound damping.
Good Flow: Standard EPS exhaust ports.
Where to buy
All online retailers
Certified Leatt Stores in US
Rocky Mountain ATV/MC
Authorized Dealer📍 Tillamook, OR and online
Price History
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
Certification Documents & References
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