The Leatt Gravity 4.0 V25 is a fixed full-face mountain bike helmet for downhill, enduro, bike-park and e-bike trail riding. This listing is for Coral in Medium, fitting a head circumference of 57–58 cm. Its 22 vents and removable mouthpiece ventilation cover allow airflow adjustment without removing the chinbar.

Construction and Features

• Lightweight polymer shell; the model uses two shell sizes.
• Fixed full-face design with a removable mouthpiece ventilation cover, not a removable chinbar.
• 22 ventilation openings.
• Fidlock magnetic closure system.
• In-molded EPS and EPO impact foam.
• Breakaway visor designed to help reduce rotational forces in a crash.
• Designed for neck-brace compatibility.
• Dri-Lex moisture-wicking, breathable, anti-odor and washable inner liner.

360° Turbine Technology

Energy-absorbing discs are designed to help manage linear impact energy and rotational acceleration. Leatt reports reductions of up to 30% in peak brain acceleration at impact speeds associated with concussion and up to 40% in peak brain rotational acceleration in its testing.

Certification and Testing

• AS/NZS 2063:2008.
• ASTM F1952–10 downhill standard.
• EN 1078.
• CPSC 1203.

Size and Specifications

• Model: Gravity 4.0 V25.
• Color: Coral.
• Size: Medium.
• Head circumference: 57–58 cm (approximately 22½–22¾ inches).
• Published model weight: from 850 g (1.87 lb); actual weight varies by size.