| 摘要 |
Tyre tread (1), this tread comprising at least two grooves (2, 3) of circumferential overall orientation delimiting intermediate parts (4) and edge parts (5), these grooves of circumferential overall orientation being formed so that they are present at least until the tread has worn down to the tread wear limit, this tread comprising a tread surface (10) in the new state, this tread comprising at least one wear limit indicator formed in a circumferential groove (2, 3) to indicate the limit to which this tread can be worn down during running, this tread on its edge regions (5) comprising a plurality of cuts (6) of transverse overall orientation and of a depth suited to being present until the tread is worn down to the wear limit, each cut (6) of transverse overall orientation being formed of a first part (61) opening onto the tread surface (10) in the new state, this first part (61) being extended toward the inside of the tread by a hollow part forming a duct (63) of mean width greater than the mean width of the groove, this duct (63) being intended to form a new transverse groove after a predetermined amount of partial wear, this tread being characterized in that the cross section of each duct (63), between the bottom of this duct and at least a height equal to the height of the wear limit indicator increases when travelling along the cut (6) axially from the inside of the tread toward the outside of the tread. |
