Patent ID: 8365783

Claim:
A tire comprising a tread band having a tread pattern defined by a plurality of grooves of substantially circumferential orientation and by a plurality of grooves of substantially transverse orientation, said grooves delimiting a plurality of rubber blocks arranged in a plurality of rows of substantially circumferential orientation, each of said blocks having a contact face and at least three side faces, wherein at least some of said blocks comprise at least one side face of substantially transverse orientation provided with a plurality of irregularly shaped steps, each irregularly shaped step being defined by an upper face, a front face, and a pair of longitudinal faces, wherein each upper face of each irregularly shaped step forms a first angle greater than 5° with the plane of the contact face of said block with respect to the transverse direction, and wherein each front face of each irregularly shaped step forms a second angle greater than 5° with the plane of said at least one side face of substantially transverse orientation of said block.