tires for vehicle wheels

Abstract

A tire (1) for a vehicle wheel, comprising a tread band (2) on which a radially outer tread surface (3) and a tread pattern are defined, and on which The following regions are defined in: - the central region (5) of said tread band, said central region being in the vicinity of the equatorial plane (X) of the tire over a width equal to at least 30% of the effective width (L) of the tread band extending circumferentially; - a first shoulder region (6) and a second shoulder region (7), in an axially outer position of the tread band, said first shoulder region and said second shoulder region, respectively extending on opposite sides of the central region, and each extending over a width equal to at least 20% of the effective width (L) of the tread band; the tread pattern in each of the first shoulder region and the second shoulder region and a corresponding plurality of transverse grooves (20; 30; 40; 50) on the central region, said transverse grooves comprising a bottom (23; 33; 43; 53) and a pair of side walls (24, 25; 34, 35; 44, 45; 54, 55). These sidewalls extend from the bottom towards the tread surface (3) at a first inclination with respect to the radial direction, and over at least a part of their extension by corresponding chamfers (26, 27; 36, 37; 46, 47; 56, 57) are attached to the tread surface, said respective chamfers have a second inclination relative to the radial direction, said second inclination being greater than the first inclination.

Description

technical field [0001] The present invention relates to tires for vehicle wheels, in particular tires for high-performance automobiles. Background technique [0002] The tire generally comprises a carcass structure shaped toroidally around an axis of rotation and comprising at least one carcass ply having terminal portions engaged in corresponding annular fixing structures Edge, the annular fixed structure is called bead core. [0003] In a radially outer position of the carcass structure there is provided a belt structure comprising, in the case of an automobile tire, at least two radially overlapping strips of rubberized fabric provided with typically The reinforcing cords are metallic, positioned parallel to each other in each strip but intersecting the cords of adjacent strips, said cords being preferably positioned symmetrically with respect to the equatorial plane of the tyre. [0004] Preferably, the belt structure further comprises a third layer of fabric or metal ...

AI Technical Summary

Problems solved by technology

[0012] However, the applicant has noticed that the modification of the dimensional parameters of the grooves improving the braking and handling characteristics can adversely affect other important properties of the tire

[0013] For example, wider and deeper lateral grooves improve braking and handling on wet surfaces but increase noise

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