Bontrager BOA Bike Helmet Fit System – Trek Store

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