KNOG OI PRIMA BELL boo Performance-focused open-face trail helmet

Performance-focused open-face trail helmet

When designing the Smith Convoy

Drivetrain: Brompton Wide-range 6 speed drivetrain (2 x 3 speed)

Striped interior neck taping

The V2 Compact Chain Guide is light

KNOG OI PRIMA BELL boo Performance-focused open-face trail helmetOi Prima bike bell features our signature wrap around bell design and our newest innovation WAVETEK hammer technology. The whip of this new hammer design helps to create a beautiful and consistent bell tone, while being built for robust and long lasting use. Available in two sizes to ensure the correct fit on your handlebar (see our size guide for info on how to measure your bar diameter). Our signature wrap around design. WAVETEK the latest in bell