TYRE RUNNING TREAD AND MOULDING ELEMENT OF A MOULD FOR SUCH A TREAD

摘要

tread (1) provided with a plurality of cuttings (5, 6, 71, 72, 73, 81, 82, 83) mainly cross-sectional, characterised in that: - in the new condition.some of the cuttings (5) cutting(6) formed on the surface of hollow areas, medium width greater than or equal to 2 mm tl, and the maximum depth (less than 80% of the thickness db of broadband user.the cuttings are 71, 72, 73, 81, 82, 83) forming on the surface of the grooves (71 ', 72', 73, 81, 82.83) of less than 2 mm in width and average li depth equal to or less than (pi; a plurality of grooves (71 ', 72', 73, 81, 82, 83) extending through hollow areas (71, 72, 73.81, 82, 83) in such a way that a uniform wear of the tread in the volume v1 of the hollow zones (71, 72, 73, 81, 82.83), and the new surface is between 50% and 150% of the volume v0 formed by hollow areas in new condition.a tight, with parts of thick and thin parts.