Crankbrothers Synthesis Freehub Body

No, this specific part is designed for compatibility with I9 Hydra, I9 1/1, and specific Crankbrothers hub systems. Always verify your current hub model before purchasing to ensure a proper fit.

Yes, this part is specifically engineered to convert your existing compatible hub to the Shimano Micro Spline standard, allowing you to run 12-speed Shimano cassettes.

While the installation is a direct swap, you will need standard bike maintenance tools, such as cone wrenches or a cassette tool, to remove the old body and install this one. If you are unfamiliar with hub maintenance, consulting a local mechanic is recommended to ensure proper bearing seating and engagement.

Alloy is chosen for this application because it offers an ideal balance of low weight and high durability. It provides the necessary strength to handle the torque loads of modern drivetrains while keeping the overall rotating mass of your wheelset down.

You should consider a replacement if you notice excessive play in the cassette, grinding noises coming from the hub, or if the pawl engagement feels inconsistent or slips under load. Visible damage to the splines where the cassette mounts is also a clear indicator that the part has reached the end of its service life.