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Leatt 4.0 Enduro Helmet with removable chinbar delivers DH-certified protection

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Leatt have added a convertible full face helmet to their range of protection; the Twenty21 4.0 Enduro Helmet. With a removable chinbar, 360° Turbine Technology, FIDLOCK real estate and DH-certified safety ratings, the Leatt 4.0 offers everything you’d need (and more) out of both a full face and open-face enduro helmet.

Leatt Twenty21 4.0 Enduro Helmet

twenty21 leatt 4.0 enduro mtb helmet convertible removable chinbar sand colorway

If you’re in the market for two-helmets-in-one, the Leatt 4.0 Enduro Helmet has to be a strong contender. Like many brands before them, Leatt are appreciating the versatility of a removable chin bar, showing that DH-level protection can be engineered into a convertible full face helmet.

leatt 4.0 enduro helmet sand colorway

We’ve seen numerous ways of doing this. The MET Parachute MCR uses a FIDLOCK magnetic clip system to install the chinbar, the Bell Super DH uses a quick release lever, while the Giro Switchblade uses a push-button release, all tool-free systems. The new Leatt 4.0 Enduro Helmet also offers a tool-free system in the form of a solid stainless steel latch.

martha gill leatt 4.0 enduro mtb helmet open full face mode convertible

Many of the aforementioned convertible full face helmets are easily converted from full- to open-face mode (and vice-versa) while positioned on the rider’s head. Leatt’s imagery shows their pro athletes switching between modes with both pieces of their helmet in their hands.

leatt dbx 2 trail mountain bike helmet review and actual weights
An example of Leatt’s Turbine technology in a previous DBX helmet

Packed into its lightweight polymer shell, the Leatt 4.0 enduro helmet houses their proprietary 360° Turbine Technology. This is a rotational impact protection system that works in a similar fashion to the more well-known MIPS system. Leatt say it can reduce peak brain acceleration by up to 30% at impact speeds associated with concussion and reduce peak brain rotational acceleration by up to 40%.

leatt enduro helmet removable chinbar dh-certified

The in-molded EPS and EPP impact foam manages energy absorption during impacts. Of course, a helmet from Leatt is always going to be compatible with neck braces for big days in the bike park.

leatt convertible enduro helmet dbx 4.0

The Leatt 4.0 Enduro helmet features a three-position visor, underneath which a set of MTB goggles can be stowed. The helmet can also stow your sunglasses here, thanks to ports built into the ventilation channels. The visor itself is said to break away in the event of a direct impact, reducing its risk of transmitting rotational forces to the head and brain.

leatt 4.0 enduro helmet open face mode all-mountain sunglasses port stow

The helmet features 18 vents in total, said to provide good ventilation at both high and low speeds. The inner liner is breathable, moisture-wicking, and treated with anti-odor compounds. When it eventually gets overwhelmed, it can be removed, washed and replaced.

leatt 4 enduro helmet martha gill manual

Finally, the chinstrap is finished with a FIDLOCK magnetic closure system which allows for a secure and easy fit, even with gloves on (and one-handed).

Pricing & Availability

twenty21 leatt 4.0 enduro helmet convertibe full face removable chinbar four colorway options chilli black cactus sand

The Leatt 4.0 Enduro Helmet retails at $299, and the same number of euro. If a removable chin bar is not what you are looking for, fear not. The Leatt 4.0 enduro is also available as an all-mountain helmet (open-face mode only), retailing for $189 or 189€. Both will be available in stores from 25th January (region dependent).

The helmet is AS/NZS 2063:2008, ASTM F1952–10, EN1078 and CPSC 1203 Certified and Tested.


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3 years ago

Finally a helmet that looks like it will actually protect my face and my head. Concussions are no joke and my Mips helmet is creaky. The turbines look like a better solution.

3 years ago

Claimed weight?

2 years ago
Reply to  Johann

850g for size M.

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