Tire treads with convex elements

A tire comprising a tread having a base portion and a plurality of traction elements extending radially outwardly from said base portion, said traction elements each having a ground-engaging surface which communicates with said base portion by means of a plurality of walls, a plurality of said ground-engaging surfaces having a form such that the locus of the points on any of these plurality of ground-engaging surfaces traveling laterally across them at any location along their circumferential lengths defines a line which is continuously convex and has its center of curvature disposed radially inwardly of said convex line, said tread having a tread arc of a radius such that the tread arc is not coincident with said convex ground-engaging surfaces, the amplitudes of the convex lines defined by the locus of the points on said plurality of ground-engaging, surfaces varies across the axial width of the tread such variation being in relation to a variation in unit tread pressure across the axial width of a footprint of the tire when the tire is mounted on a rim having the design rim width for said tire, and subjected to a load while the tire is inflated to its specified inflation pressure for said load, such that the amplitude of a convex line is greater for a ground-engaging surface located in a region of relatively high unit pressure and lesser for a ground-engaging surface located in a region of relatively low unit pressure.