* Replacement freehub body compatible with Neo 2T (T2875.60), Flux S (T2900S.60 A), Flux 2 (T2980.60 A) direct drive trainers* NOT compatible with older generation Neo (T2800), Neo 2 (T2850/T2850.60), Flux (T2900), Flux S (T2900S/T2900S.60) and Flux 2 (T2980/T2980.60)