| 摘要 |
<p>The invention relates to a tread (1) of a tire for an axle of a heavy vehicle, said tread including at least four circumferential grooves (2) defining two shoulder ribs (3e), intermediate ribs (3i), and a central rib (3c), each of the intermediate ribs and the central rib being provided with a plurality of transverse incisions (4) having a width of less than 2 mm, said incisions being tilted at a mean angle relative to a direction perpendicular to the contact surface of the tread in the new condition, said mean angle being at least equal to 5 degrees and oriented such that the resulting force exerted on the tread, on the area contacting the road surface and by said road surface when the vehicle is travelling, tends to straighten the incisions (4) to a zero mean angle with respect to the same perpendicular direction, said tread being characterized in that the following relations are satisfied: (AA) 0.660Ai*Ac<0.910.</p> |
