Pneumatic tire

摘要

A pneumatic tire has an asymmetric tread pattern. The width of an outboard shoulder main groove (3) is 3 to 4% of the tread width TW. The width of an inboard shoulder main groove (4) is 5 to 6% of TW. The width of an outboard crown main groove (5) is 6 to 7% of TW. The width of an inboard crown main groove (6) is 6 to 7% of TW. In each of the grooves (4, 5, 6), an outboard groove face's angle θ1 is more than an inboard groove face's angle θ2, wherein θ1 is 13 to 19 degrees, and θ2 is 9 to 14 degrees. In the groove (3), an outboard groove face's angle θ3 is 9 to 14 degrees, and an inboard groove face's angle θ4 is 5 to 8 degrees.

主权项

1. A pneumatic tire comprising:
a tread portion provided with an asymmetric tread pattern and having an outboard tread edge and an inboard tread edge between which a tread width is defined, the tread portion provided with circumferentially continuously extending main grooves including an outboard shoulder main groove, an inboard shoulder main groove, an outboard crown main groove and an inboard crown main groove so as to axially divide the tread portion into
an outboard shoulder land section defined between the outboard shoulder main groove (3) and the outboard tread edge,an outboard middle land section defined between the outboard shoulder main groove and the outboard crown main groove,a crown land section defined between the outboard crown main groove and the inboard crown main groove,an inboard middle land section defined between the inboard crown main groove and the inboard shoulder main groove, andan inboard shoulder land section defined between the inboard shoulder main groove (4) and the inboard tread edge,wherein
the groove width of the outboard shoulder main groove is 3 to 4% of the tread width, the groove width of the inboard shoulder main groove is 5 to 6% of the tread width, the groove width of the outboard crown main groove is 6 to 7% of the tread width, the groove width of the inboard crown main groove is 6 to 7% of the tread width, in each of the inboard shoulder main groove, the inboard crown main groove and the outboard crown main groove, an outboard groove face's angle θ1 is more than an inboard groove face's angle θ2, the outboard groove face's angle θ1 is 13 to 19 degrees, and the inboard groove face's angle θ2 is 9 to 14 degrees, in the outboard shoulder main groove, an outboard groove face's angle θ3 is 9 to 14 degrees, and an inboard groove face's angle θ4 is 5 to 8 degrees, the outboard shoulder land section is provided with a plurality of outboard shoulder lateral grooves extending axially inwardly from a position axially outside the outboard tread edge, the outboard shoulder lateral grooves include first outboard shoulder lateral grooves whose axially inner ends are connected to the outboard shoulder main groove, and second outboard shoulder lateral grooves whose axially inner ends are terminated within the outboard shoulder land section without connected to the outboard shoulder main groove, and the first outboard shoulder lateral grooves and the second outboard shoulder lateral grooves are arranged alternately in the tire circumferential direction, the outboard middle land section is provided with a plurality of outboard middle lateral grooves extending axially inwardly from the outboard shoulder main groove and terminating within the outboard middle land section without connected to the outboard crown main groove, wherein each of the first outboard shoulder lateral grooves is provided in an axially inner part thereof with a tie bar rising from the groove bottom and provided with a sipe.