| 主权项 |
1. A pneumatic tire comprising
a tread portion having a pair of tread edges, the tread portion being provided with a pair of circumferentially and continuously extending shoulder main grooves adjacent to each tread edge and a pair of circumferentially and continuously extending center main grooves disposed axially inwardly of the shoulder main grooves to define a pair of middle portions each of which is between the adjacent shoulder main groove and center main groove, the shoulder main grooves having groove widths, the center main grooves having groove widths larger than the groove widths of the shoulder main grooves, and the respective middle portions being provided with a plurality of inner middle lug grooves extending axially outwardly of the tire from the center main groove, and a plurality of outer middle lug grooves extending axially inwardly of the tire from the shoulder main groove, the total number of inner middle lug grooves being smaller than the total number of outer middle lug grooves, in each middle portion. |
