TYRE PROVIDED WITH A TREAD HAVING SIDE RIBS WHOSE SURFACES ARE RADIALLY SET BACK IN RELATION TO THE OTHER RIBS

摘要

To improve the separation resistance between the ends of the working plies (31-34) of a top reinforcement (3) and between the edges of this reinforcement (3) and the radial carcass reinforcement (2), said plies have varying axial widths and at least two of the widths are greater than the axial distance (L) between the centre lines (XX') of the two side grooves (6) formed nearest the edges of the tread (1) and defining side regions (7) where the tread (1) has a meridian profile (8) which is radially set back in relation to the meridian profile (9) of the geometrical envelope of its medial region.