Direct Drive Trainer SRAM Body
The standard body of Tacx Smart indoor trainers like the NEO Smart and FLUX Smart is not compatible with all cassettes. That's why you'll need this Tacx T2805.81 XD-R Freewheel Body if you have a SRAM cassette on your bike.
For Road and MTB Cycles
This genuine Tacx indoor trainer part fits both Road and MTB cycles and is compatible with 11/12 speed SRAM cassettes. To install this body, you’ll need a 5mm Allen Key.