TACX Direct Drive Trainer Freehub

The standard freehub body provided with TACX direct drive trainers, for example the NEO 2T Smart, is not compatible with all cassettes. Therefore additional compatible freehub bodies are available for Campagnolo, SRAM XD-R and SRAM XD cassettes. Also important to note is that some of these replacement freehubs are trainer model/version specific. 
T2875.51 CAMPAGNOLO
The Campagnolo body is suitable for 9 through and including 12 speed Campagnolo cassettes. This version is used for the NEO 2T.

T2805.51 CAMPAGNOLO
The Campagnolo body is suitable for 9 through and including 12 speed Campagnolo cassettes.

T2875.76 SRAM XD-R
The SRAM XD-R body is suitable for 11 and 12 speed SRAM XD and SRAM XD-R cassettes. This version is used for the NEO 2T.

T2805.81 SRAM XD-R
The SRAM XD-R body is suitable for 11 and 12 speed SRAM XD and SRAM XD-R cassettes.

T2875.01 Shimano/SRAM