Patent ID: 7367370

Claim:
A tire tread comprising a plurality of blocks, each block delimited by at least two grooves spaced apart along a circumference of the tire, each block comprising a contact face for contacting a road during tire rolling, and leading and trailing faces intersecting the contact face to respectively form therewith a leading edge and a trailing edge considered with reference to a direction of tire rolling, the leading edge and the trailing edge being substantially parallel to one another, each block having a profile extending from the leading edge to the trailing edge, wherein: A) the profile includes a first bump in relief relative to an imaginary straight line passing through the leading and trailing edges, the first bump being located in the region of the leading edge, a first radially outermost point of the first bump being spaced by a first radial distance from the straight line and spaced by a first front-to-rear distance along the straight line from the leading edge to an imaginary line oriented perpendicular to the straight line and passing through the first radially outermost point; B) the profile includes a second bump in relief relative to the straight line, the second bump being located in the region of the trailing edge, a radially outermost point of the second bump being spaced by a second radial distance from the straight line and spaced by a second front-to-rear distance along the straight line from the trailing edge to an imaginary line oriented perpendicular to the straight line and passing through the second radially outermost point; C) the profile passes through a point spaced a third radial distance from the straight line at a location substantially halfway between the leading and trailing edges; D) the leading and trailing edges being spaced apart by a separation distance along the straight line; E) a ratio of the first front-to-rear distance divided by the separation distance is greater than 0.1 and less than 0.25, F) a ratio of the second front-to-rear distance divided by the separation distance is greater than 0.1 and less than 0.25, G) each of the first and second radial distances is greater than 0.1 mm and less than 2.5 mm; H) one of the first and second radial distances is shorter than the other of the first and second radial distances, and I) the third radial distance is greater than zero and less than one-half of each of the first and second radial distances.