These Garmin freehub bodies fit all 2020 and newer Tacx NEO 2 Smart trainers and allow you to convert to either Campagnolo or SRAM XDR cassettes. The SRAM version fits only 12 speed XDR cassettes, while the Campagnolo version will fit all 9, 10, 11 and 12 speed Campagnolo cassettes. The set-up retains easy removal and installation, along with precision steel construction paired with quality sealed bearings.