| 摘要 |
A tread of a total thickness E for tires, comprising, when new: a running surface intended to be in contact with the roadway during travel; a plurality of first cutouts of a depth of less than the thickness of the tread and defining tread pattern elements of a height less than the total thickness of the tread; a plurality of cavities subjacent the running surface when new and extending over an average length L, each of these cavities being intended to form at least one new groove or incision after partial wear of the tread; each cavity delimited by the rubber of the tread having an upper generatrix beneath the running surface when new; this tread being characterized in that, for each cavity, the upper generatrix follows an undulating profile having a series of recesses and elevations, the amplitude of these recesses and elevations being at least 10% of the depth of the new grooves or incisions created.
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