Disc brake

A disc brake comprising:

• an actuation mechanism that includes a tappet, the tappet having a first formation;
• a disc brake rotor arranged to rotate about a rotational axis;
• first and second mounting structures to be located in use adjacent opposing inboard and outboard faces, respectively, of the disc brake rotor, the second mounting structure having a second formation;
• first and second brake pads located by the first and second mounting structures, respectively, such that upon application of the actuation mechanism the first and second brake pads clamp the disc brake rotor and brake torque is reacted by the first and second pad mounting structures;
• wherein the first brake pad has a corresponding first formation for interacting with the first formation of the tappet, and the second brake pad has a corresponding second formation for interacting with the second formation of the second mounting structure, wherein (i) the first formation of the tappet and the second formation of the second mounting structure and (ii) the first formation of the first brake pad and the second formation of the second mounting structure do not have mirror symmetry about a plane defined by a center of the disc brake rotor, a radial axis, and a circumferential direction normal to both the rotational axis of the disc brake rotor and radial axis, and
• wherein to prevent or inhibit fitting of the first and second brake pads individually or in combination with friction material facing away from the disc brake rotor, the first formation of the tappet must interact with the corresponding first formation of the first brake pad for the first brake pad to be fitted in the first mounting structure, and the second formation of the second mounting structure must interact with the corresponding second formation of the second brake pad for the second brake pad to be fitted in the second mounting structure.