Hope fortus 30 freehub help which!?

[Rail5]

Evening all I’m having a nightmare,

I have a trek rail5 with a sram eagle 12 speed cassette. What freehub body do I need to accommodate an get the bloody thing on my bike.

 

[deksawyer]

If it's GX or above, you'll need an XD driver body, if it's NX or below, you'll need the std Shimano style body.