Patent ID: 7311128

Claim:
A tread band for a tire of a vehicle comprising a plurality of grooves of circumferential orientation defining tread pattern elements comprising, in addition to a contact face intended to come into contact with the roadway during travel, at least two lateral faces, this tread comprising, in the axial direction, at least two different base mixes opening on to the contact faces of the tread pattern elements when the tread is new, one base mix having a grip on wet ground which is greater than the grip of the other base mix, and wherein a plurality of the lateral faces of circumferential general orientation are covered at least in part with a covering mix extending from the contact face over at least 30% of the height of the lateral faces and over a thickness at most equal to 30% of the average distance between the lateral faces of circumferential general orientation of said element, wherein the covering mix of the tread pattern elements on one part of the running surface is different from the covering mix of the tread pattern elements of the other part of the running surface, the covering mix located axially towards the inside of the vehicle having a wet grip greater than that of the covering mix of the other part located axially towards the inside of the vehicle, and wherein each covering mix comprising a reinforcing inorganic filler having a grip on wet ground which is higher than the grip of each of the base mixes on the same ground.