| 摘要 |
The invention concerns a running tread (1) for tyre designed to equip a heavy vehicle front axle, said tyre having a preferential running direction, said tread comprising grooves (2) with general circumferential orientation delimiting at least three ribs (30, 31, 32, 33, 34), two of said ribs forming the edges (30, 34) of the tread, some of the intermediate ribs (31, 32, 33) being provided with a plurality of sipes (41, 42, 43) with general transverse orientation and substantially mutually parallel, said sipes having a non-null mean inclination relative to the direction perpendicular to the running tread surface in new condition. Said tread is characterised in that, viewed in a section plane perpendicular to the tyre axis of rotation, the sipes formed on the intermediate ribs form on and proximate to the running surface when the tread is in new condition, an angle close or equal to 0 DEG with a perpendicular to said surface at the point of intersection, while each of said sipes form with the same perpendicular an angle which increases into the thickness of the tread.
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