PNEUMATIC TIRE

摘要

A pneumatic tire includes a tread portion provided with a pair of center main grooves to define a center portion therebetween, a pair of shoulder main grooves arranged axially outside the center main grooves to define a middle portion between the center and shoulder main grooves, and middle lateral grooves to divide the middle portion into middle blocks. Each center main groove extends in a zigzag manner including inclined long sides and inclined short sides alternately arranged in a circumferential direction of the tire. The center portion is provided with at least six center sipes within a circumferential region corresponding to a pitch of middle lateral grooves. Each middle block has a circumferential length of 85% to 95% the pitch, and is provided with at least one middle sipe. The number of middle sipe on each middle block is five or less.

主权项

1. A pneumatic tire comprising
a tread portion provided with: a pair of circumferentially and continuously extending center main grooves on both sides of a tire equator to define a center portion therebetween; a pair of circumferentially and continuously extending shoulder main grooves arranged axially outside the center main grooves to define a middle portion between the center main groove and the shoulder main groove on each side of the tire equator; and a plurality of middle lateral grooves to divide the middle portion into a middle block row including a plurality of middle blocks, each center main groove extending in a zigzag manner including a plurality of inclined long sides and a plurality of inclined short sides, which are alternately arranged in a circumferential direction of the tire, the center portion being provided with at least six axially extending center sipes within a circumferential region corresponding to a pitch of circumferentially adjacent middle lateral grooves, and each middle block having a circumferential length in a range of from 85% to 95% with respect to the pitch, and being provided with at least one axially extending middle sipe, wherein the number of middle sipe on each middle block is five or less.