Patent ID: 9139049
Filing Date: 2015-09-22
Classification: B60C

Abstract:
1. A tire having, in a tread portion, at least one row of rib-like land portion and sipes provided in the rib-like land portion, the sipes extending in a straight line and substantially parallel to a tire widthwise direction, characterized in that: said sipes each having a first portion and a second portion, the first portion being disposed at a shoulder side of said of said land portion and having a smaller depth than the second portion, wherein the groove bottom of the sipe is provided with an enlarged portion having a length in the tire circumferential direction longer than the opening width of the sipe at a ground contact surface of the tread portion, wherein only a groove bottom portion having the maximum depth of the sipe is provided with the enlarged portion, and wherein the sipe has a connecting region provided between said first portion and said second portion, and the connecting region comprises a straight or substantially straight line forming an inclination angle with respect to the tire widthwise direction in the range of 110° to 160°.