Leatt · MTB 4.0 V21
Leatt MTB 4.0 V21
DOT, ECE 22.05
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About the Leatt MTB 4.0 V21
Full FaceDominate the trail with the Leatt MTB 4.0 V21, a full-face helmet engineered for riders who demand uncompromising safety and aerodynamic efficiency. Designed specifically for mountain biking, this helmet features an advanced MIPS technology layer that rotates independently of your head to dissipate rotational energy during glancing blows, significantly reducing the risk of concussions. The sleek, aggressive profile cuts through the air, minimizing drag at high speeds while the integrated visor shields your eyes from debris and sun glare. With a secure fitment system and premium ventilation channels, you stay cool and focused regardless of the terrain's intensity. Whether navigating technical descents or cruising open trails, the MTB 4.0 V21 offers the perfect blend of protective engineering and modern style.
Technical Analysis
The Leatt MTB 4.0 V21 utilizes a multi-density EPS liner and an integrated MIPS system to manage rotational forces during high-impact crashes. Its aerodynamic shell design reduces wind turbulence at speed, while the adjustable visor mechanism ensures consistent optical clarity without compromising structural rigidity.
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
Part numbers
| Product style | MFR. product # | SKU | Availability |
|---|---|---|---|
| Matte Black / | — |
LEA-MTB4-MBK | instock |
| Gloss Red / | — |
LEA-MTB4-RED | instock |
| Carbon / | — |
LEA-MTB4-CAR | instock |
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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