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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.
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Part Numbers close open
Option Barcode Manufacturer’s Part Number Store SKU Charcoal/Black / Small (51-57 cm) 00768682342961 433625 HEL4020712K Charcoal/Black / Medium (54-60 cm) 00768682342985 433626 Charcoal/Black / Large (58-63 cm) 00768682343005 433627 White/Silver / Small (51-57 cm) 00768682343029 433628 White/Silver / Medium (54-60 cm) 00768682343043 433629 White/Silver / Large (58-63 cm) 00768682343067 433630 Red/Black/White / Small (51-57 cm) 00768682343081 433631 Red/Black/White / Medium (54-60 cm) 00768682343104 433632 Red/Black/White / Large (58-63 cm) 00768682343128 433633 Black/Vis Yellow / Small (51-57 cm) 00768682343142 433634 Black/Vis Yellow / Medium (54-60 cm) 00768682343166 433635 Black/Vis Yellow / Large (58-63 cm) 00768682343180 433636 Black / Blue / White / Small (51-57 cm) 00768682860809 501435 Black / Blue / White / Medium (54-60 cm) 00768682860793 501436 Black / Blue / White / Large (58-63 cm) 00768682860786 501437 Visibility Yellow / Small (51-57 cm) 00601479339099 521321 Visibility Yellow / Medium (54-60 cm) 00601479339556 521322 Visibility Yellow / Large (58-63 cm) 00601479339563 521323 Black / White / Red / Small (51-57 cm) 00601479339129 521330 Black / White / Red / Medium (54-60 cm) 00601479339617 521331 Black / White / Red / Large (58-63 cm) 00601479339624 521332
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