Bontrager's Circuit is a lightweight road helmet that features 21 vents for maximum airflow. It features their one-hand-adjustable Zip-Tite fit system, plus it has an in-molded strap retention system with LockDown strap adjusters for a superb fit and top-notch safety. The premium fit pads not only give you a custom feel, they also help keep your head dry on those hot rides.
- Small = 52-56cm
- Medium = 56-60cm
- Large = 60-64cm
|Silver/White / Small||745889800197||420676||HEL38356949R|
|Matte Black / Small||745889800074||420670||HEL3791791K|