Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Ballista MIPS Bike Helmet
Trek

Ballista MIPS Bike Helmet

UPC: 197216074007
Color — Viper Red/Nautical Navy
Size
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Size chart
 Size  Head Circumference
Small  

51 - 57 cm

20" - 22"
Medium  

54 - 60 cm

21" - 24"
Large  

58 - 63 cm

23" - 25"

Category:
Road
Weight (g):
275 g (Medium)
Protection:
Mips
Certification:
U.S. CPSC safety standards
Retention System:
BOA fit system
Number of vents:
4

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
  • Weight: 275 g (Size Medium)

Trek's Fastest Helmet Ever

Ballista is the fastest helmet in Trek's lineup. Its aerodynanic efficiency saves riders 10.1 watts of power and more than one bike length during a final sprint versus Velocis in a standard 1-hour test.

Unexpectedly Light

Ballista is light. At 275 grams, its minimalistic, low-profile design makes for a faster helmet that's lighter than ever before.

Cool is Fast

Insight from computational fluid dynamic analysis helped optimize vent and channel design for more efficient airflow, creating a cool helmet.

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