Bontrager BOA Bike Helmet Fit System

This system is compatible with most BOA-equipped Bontrager helmets, but it does not fit the Velocis Mips or WaveCel models. Before purchasing, verify your helmet model and ensure it is currently equipped with a BOA or Headmaster retention system.

Yes, this kit is designed to upgrade older Bontrager helmets that originally came with the Headmaster retention mechanism. It provides a more modern, micro-adjustable dial experience.

The fit system comes in two lengths: the short version is optimized for small-sized helmets, while the full-length version is designed for medium and large helmets. Select the length that matches your current helmet size to ensure proper tension and stability.

The installation is straightforward and generally requires only basic tools, though it does involve removing the existing retention cradle from your helmet. If you are uncomfortable performing minor mechanical work on your safety gear, your local bike shop can typically handle the swap quickly.

This is a full-length or short-length fit system replacement, meaning it includes the entire rear retention cradle and the dial mechanism. It is a complete assembly designed to replace the entire retention unit inside your helmet.