Abstract: A floating disc brake assembly, and method of assembly, comprising a disc brake rotor comprising an outer friction ring, an inner circumferential flange having a plurality of rotor tabs spaced about the flange and a circumferential groove about the inner circumferential flange, a hat comprising a cylindrical axial body, an outer circumference, a rotor mounting flange extending radially about the outer circumference and having a plurality of rotor mounting tabs spaced about the rotor mounting flange and forming slots interspersed therebetween structured and arranged for receiving the rotor tabs, and a circumferential groove about the outer circumference of the axial body, structured and arranged to align with the circumferential groove of the disc brake rotor, and at least one expander ring structured and arranged to fit within the circumferential grooves of both the rotor and the hat.