Freehub bodies are crucial components of rear hubs, allowing smooth coasting and efficient power transfer when pedaling. Designed to fit specific drivetrain systems like Shimano HG, SRAM XD, or MicroSpline, freehub bodies are available in lightweight and durable materials such as aluminum or steel. Whether replacing a worn-out part or upgrading for better performance, a high-quality freehub body ensures reliable engagement and compatibility with your cassette.