Bontrager Circuit
matte black large (60-64cm)
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Styled for maximum airflow and go-fast good looks, the lightweight, 21-vent Circuit was designed using Computational Fluid Dynamics, for an air-gobbling shape that delivers superb ventilation and unbeatable air flow.


  • Lightweight road helmet for superior performance
  • 21 CFD software enhanced vents for maximum airflow and efficiency
  • Premium, wicking fit pads
  • One-hand adjustable Zip-Tite fit system
  • Three sizes assure the best fit
  • In-molded strap retention system with Lockdown strap adjusters
Color Matte Black
Helmet Type Road
Logo Bontrager Logo
Retention System W/Zip-Tite Fit System
Size Large (60-64Cm)
Sizing Pads Premium Pads
Vents 21 Vents
BikePedia Item ID: 665996
Mfr's Part #: 420672

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