Patent ID: 8695659
Filing Date: 2014-04-15
Classification: B60C

Abstract:
1. A pneumatic tire, comprising a tread surface including a land portion defined by a main groove extending in a circumferential direction of the tire, wherein the land portion is formed with a first type sipe having a step portion extending in a width direction of the tire on one sipe wall surface and a second type sipe having a step portion extending in the width direction of the tire on a sipe wall surface facing in the opposite direction of the first type sipe as viewed in the circumferential direction of the tire, each of the first type sipe and the second type sipe is formed as a one-side closed sipe extending in the width direction of the tire; and by forming the step portion, the width of the sipe perpendicular to the longitudinal direction of the sipe is formed to be narrower at the bottom side of the sipe than the width is at the tread surface side, and wherein each of the first type sipe and the second type sipe has a concave portion in the sipe wall surface located at the side where the step portion is not formed.