Shimano 12mm Thru-Axle Freehub Body Once switching out your casettes starts becoming an issue, it's about time to switch out the freehub body for a brand spanking new one! This Shimano 12mm Thru-Axle Freehub Body will fit FH-M988, FH-M828, FH-M788, WH-MT68, FH-M678, FH-M618 hubs. Fulcrum Racing Zero HG Wheelset Specifications 12mm Thru-axle freehub body and freehub body washer Uses Shimano TL-FH15 (15mm hex key) to remove | Shimano 12mm Thru-Axle Freehub Body For M988, M828, M788, MT68, M678, M618