The TACX Campagnolo Freehub Body is specifically designed for use with TACX Neo and Flux trainers, featuring a 6mm internal diameter axle hole. This freehub body allows seamless compatibility with Campagnolo drivetrains, ensuring smooth and efficient power transfer during your indoor cycling sessions. Its durable construction guarantees longevity, making it an essential component for serious cyclists looking to enhance their training experience. Upgrade your TACX trainer with this reliable freehub body for optimal performance.