Bontrager Bontrager BOA Bike Helmet Fit System

Keep safe and look great with genuine replacement parts for your Bontrager helmet.

- Original equipment replacement BOA® Fit System for your Bontrager helmet
- Compatible with BOA®-equipped Bontrager helmets, except Velocis Mips and WaveCel
- Upgrade your Headmaster-equipped Bontrager helmet to the BOA® Fit System
- Full-length fit system designed for use with medium and large sized helmets
- Short length fit system designed to optimize the fit of small sized helmets