Bontrager's Circuit is a lightweight road helmet that features massive vents for maximum airflow. It features their one-hand-adjustable Headmaster fit system, plus it has an in-mold strap retention system with FlatLock strap adjusters for a superb fit and serious safety. The premium fit pads not only give you a custom feel, they also help keep your head dry on those hot rides.
- Small = 51-57cm
- Medium = 54-60cm
- Large = 58-63cm
|Option||Barcode||Manufacturer's Part Number||Vendor Number|
|Black / White / Red / Small||601479339129||521330||TRK-521330|
|Visibility Yellow / Small||601479339099||521321||TRK-521321|
|Black/Vis Yellow / Small||768682343142||433634||TRK-433634|