SRAM Freehub Body For 746 Rear Hub Replacement Freehub Body for SRAM 746 rear hub. This freehub is compatible with XD-compatible cassettes. It features durable sealed bearings and a high-quality 3 pawl engagement system. If you are switching your drivetrain to a new SRAM 12-speed drivetrain, you will need a XD freehub. The freehub comes with the pawls and springs installed making replacement quick and easy. Features Compatibility SRAM 746 Hubs | Sram | Freehub Body For 746 Rear Hub Xd Driver