The Leatt MTB Enduro 4.0 in Stealth Black/Grey is a convertible full face mountain bike helmet that gives you downhill-certified protection on the descents and a cooler open face setup for the climbs. Pop the chin bar off at the top of the hill, clip it back on before the steep stuff, and enjoy one helmet that does the job of two.

This is the helmet we point enduro cyclists and e-MTB owners towards when they want proper full face protection without overheating on long days. If your weekends mix big climbs, bike park laps and rough technical singletrack, the Enduro 4.0 lets you change your level of protection to suit the trail instead of compromising.

Removable DH-Certified Chin Bar

The chin bar uses a strong magnesium locking system and the complete helmet is ASTM downhill certified, so it is not just a half shell with a token jaw guard. Take it off for climbing and cruising, then lock it back in place when the trail turns serious. A removable mouthpiece cover lets you open up airflow on hot days or keep mud and cold air out in poor weather.

360° Turbine Technology

Leatt’s 360° Turbine Technology uses small, energy-absorbing discs inside the helmet that can move in any direction on impact. They help reduce head impact at concussion level by up to 30% and rotational acceleration to the head and brain by up to 40%, giving you extra confidence every time you head out. Dual-density EPS and EPP impact foam adds another layer of energy absorption.

Ventilation That Works at Climbing Speed

Eighteen vents with channels optimised for low speeds keep air moving across your head, even when you are grinding up a fire road. The moisture-wicking, anti-odour liner is removable and washable, which makes a big difference after a summer of sweaty enduro days.

Goggle and Sunglasses Friendly

The adjustable visor lifts high enough to park your goggles underneath, and a universal sunglasses dock holds your glasses safely when you are not wearing them. The Fidlock magnetic buckle is easy to do up one-handed, even with gloves on or tired fingers after a long descent.

Item specs

• Brand: Leatt
• Model: MTB Enduro 4.0
• Helmet type: Convertible full face mountain bike helmet with removable chin bar
• Colour: Stealth Black/Grey
• Shell: Lightweight polymer
• Impact foam: In-moulded EPS + EPP
• Brain protection: 360° Turbine Technology
• Ventilation: 18 vents
• Closure: Fidlock magnetic buckle
• Liner: Moisture-wicking, breathable, anti-odour and washable
• Features: Goggle-compatible adjustable breakaway visor, sunglasses dock, removable mouthpiece cover, neck brace compatible
• Weight: From 810g (size S)
• Certifications: ASTM F1952 (Downhill), AS/NZS 2063:2008, EN1078, CPSC 1203
• Sizes: S (51-55cm), M (55-59cm), L (59-63cm) head circumference
• Suitable for: Enduro, trail, bike park and e-MTB cycling