Trek Ballista

When speed is your top priority and every watt counts, reach for the helmet that'll cut through the wind to save you seconds. Ballista is Trek's fastest, most aerodynamically-advanced helmet.

Ballista is light, cool, comfortable, and engineered with a fully-integrated Mips Air safety system that's designed to help keep you safer.

• Trek's fastest, most aerodynamic helmet will save big watts and shave crucial seconds
• An excellent ventilation system makes this aero helmet surprisingly cool and comfortable
• The Mips Air system is light, cool, and designed to help reduce rotational forces
• The single-lace BOA® fit system is fully adjustable to provide a custom, 360° fit
• Rubberized sunglasses docking port provides secure and easy-to-use storage
• Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership
• 30-Day Unconditional Guarantee allows you to return your helmet if you're unsatisfied for any reason
• Complies with U.S. CPSC safety standards for bicycle helmets for persons age 5 and over