Switching drivetrain ecosystems or replacing a worn freehub body on your ENVE wheels requires the correct interface for your INNERDRIVE hub. The ENVE InnerDrive Freehub Body slides onto the hub's oversized 42mm ratchet drive mechanism and includes the 12mm thru-axle drive-side endcap needed to complete the assembly. This is a direct replacement part that maintains compatibility with your existing ratchet rings regardless of tooth count.

Freehub body options cover the major cassette standards: XDR for SRAM 11 and 12-speed road and mountain cassettes, HG for Shimano HyperGlide 8 through 11-speed plus Shimano 12-speed road cassettes, Microspline for Shimano 12-speed mountain cassettes, XD for SRAM mountain cassettes, and N3W for Campagnolo 13-speed. If you're converting from one drivetrain brand to another, swapping the freehub body takes a few minutes and doesn't require any special tools beyond what you'd use for normal hub service.

One compatibility note worth checking before you order: these freehub bodies fit INNERDRIVE Premium hubs only. They won't work with the older ID360 hubs or the newer INNERDRIVE PRO hubs, which each use different freehub interfaces. If you're unsure which hub generation you have, the INNERDRIVE Premium hubs shipped on SES and G Series wheels starting in 2023 and feature the straight-pull spoke interface with anti-twist spoke holes. The ratchet engagement system transfers power through oversized steel ratchets positioned inboard over the bearings, and this freehub body maintains that interface without requiring you to touch the ratchet rings or springs during installation.