A pad and spring assembly for a disc brake comprising a disc and a brake caliper having a caliper body adapted to straddle the disc, said disc brake defining an axial direction (X-X) either parallel to or coinciding with the rotation axis of the disc, a radial direction (R-R) orthogonal to the axial direction (X-X), and a tangential (T-T) or circumferential direction (T-T), orthogonal to both the axial direction (X-X) and the radial direction (R-R); and wherein a radially inner sense, or radially inner direction, directed in radial direction (R-R) towards the rotation axis of the disc, and an opposite radially outer sense, or outer radial direction are defined; said pad and spring assembly comprising at least one brake pad (8, 9) and at least one spring device, wherein said spring device comprising a spring body having prevalently longitudinal development, comprising: - at least one coupling portion, to connect said spring device to a portion of an associable brake caliper in removable manner; - at least one first thrust portion, or disc-inlet-side thrust portion, - at least one second trust portion, or disc-outlet-side thrust portion, longitudinally opposite to said disc-inlet-side thrust portion with respect to said coupling portion of the trust body; said at least one first thrust portion and said at least one second thrust portion being adapted to bias at least one brake pad (8, 9) in axial direction (X-X) away from the disc, in inner radial direction, and in tangential direction (T-T) in opposition to the rotation direction of the disc; wherein each of said at least one first thrust portion and said at least one second thrust portion comprises at least one cradle comprising a convex surface, which in working position substantially faces the inner radial direction and is adapted to face the at least one brake pad (8, 9); and wherein said convex surface of the at least one cradle comprises a thrust surface, adapted to form an axial, tangential and radial abutment reference for at least one portion of a support plate of the at least one brake pad (8, 9), so that said at least one pad (8, 9), by pressing against said convex surface of the cradle of said at least one first thrust portion and of said at least one second thrust portion, puts in traction the spring body of said spring device between said disc-inlet-side thrust portion and said disc-outlet-side thrust portion, providing an assembly preload to the spring device; wherein said at least one brake pad (8, 9) comprises at least one friction material and at least one support plate, said at least one support plate comprising a friction surface with which said friction material is associated, an opposite plate back, adapted to form an abutment reference of a brake caliper which can be associated with the brake pad (8, 9), and a plate edge which delimits said friction surface and said opposite plate back; said plate edge comprising a radially inner edge, facing the radially inner direction, and a radially outer edge, facing in radially outer direction, wherein said radially outer edge comprises at least one protrusion edge which delimits at least one protrusion of the support plate, and wherein said at least one protrusion edge comprises at least one ramp surface (40, 50), inclined with respect to the radial direction (R-R) and to the tangential direction (T-T); said at least one ramp surface (40, 50) forms an abutment reference for said at least one thrust surface of either said at least one disc-inlet-side thrust portion or said at least one disc-outlet-side thrust portion of the spring device which biases said at least one brake pad (8, 9) in axial (X-X), tangential (T-T) and inner radial directions, characterized in that, by pressing said at least one brake pad (8, 9) in outer radial direction against the convex surface of the cradle of said at least on disc inlet thrust portion and of said at least one disc-outlet-side thrust portion of the spring device, said at least one ramp surface (40, 50) of the support plate puts in traction the spring body between said disc-inlet-side thrust portion and said disc-outlet-side thrust portion, providing an assembly preload to the spring device. - at least one coupling portion, to connect said spring device to a portion of an associable brake caliper in removable manner; - at least one first thrust portion, or disc-inlet-side thrust portion, - at least one second trust portion, or disc-outlet-side thrust portion, longitudinally opposite to said disc-inlet-side thrust portion with respect to said coupling portion of the trust body;