Campagnolo's tall-spline freehub design has remained its own standard for decades, which means mounting a Campy cassette requires more than just swapping cogs. The Wahoo Campagnolo Freehub Body replaces the Shimano-compatible freehub that ships with KICKR trainers, giving you direct compatibility with Campagnolo 10, 11, and 12-speed cassettes. If you've committed to Campagnolo's ecosystem on your road bike, this adapter lets your trainer match that commitment without requiring a dedicated trainer cassette from a different brand.

The freehub body accepts most modern Campagnolo cassettes manufactured from 2010 onward. There's one compatibility check to perform before ordering: count the inner arms on your cassette's largest cog. Cassettes with four inner arms work correctly, while cassettes with eight inner arms are not compatible with this freehub design due to clearance issues with the trainer's internal mechanism. Most current Campagnolo cassettes use the four-arm design, but some older 10-speed models featured eight arms.

Beyond Campagnolo cassettes, this freehub also supports Shimano and SRAM HG-style cassettes when paired with the included spacers. That versatility means you can switch between a Campagnolo cassette for training with your outdoor bike's drivetrain and a Shimano cassette for general indoor use without swapping the freehub body between sessions. The kit includes both 11T and 12T lockrings to match whichever Campagnolo cassette configuration you install, covering the full range of current road groupsets.... Read More