When speed is your top priority and every watt counts, reach for the helmet thatll cut through the wind to save you seconds. Ballista is Treks fastest, most aerodynamically-advanced helmet.
Ballista is light, cool, comfortable, and engineered with a fully-integrated Mips Air safety system thats designed to help keep you safer.

• Treks 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 youre unsatisfied for any reason