PURPOSE: To prevent the deterioration of wet skid performance and reduce tire noise even when a tread wears by forming the groove pattern of outer side in the radial direction into a rib pattern and at least a part of the groove pattern in the inner side in the radial direction into a block pattern, in the using area of the tread.

CONSTITUTION: A precure tread 4 is stuck with an adhesive agent to the crown section of a base tire 2 through a cushion rubber 3, The groove pattern of this tread 4 is formed into a rib pattern on the outer side in the radial direction and a block pattern of on inner side in the radial direction, and the tread is made in such a way that when the tread wears by 30-40% of total depth of the groove, the rib pattern turns into the block pattern. This rib pattern comprises the ground contact sections of the outer side in the radial direction, which are opposed to each other with a tread groove 20 between them and connected to each other by a plurality of connection sections 40, and the thickness (t) of these connection sections 40 is set at 10 to 15% of the total depth D of the grooves 25 which will become lateral grooves after wearing. Therefore, even if the tread 4 wears, this tire can be used in all seasons in districts where snow lies in winter without deteriorating wet skid performance and increasing noise.