Abstract: A pneumatic tire according to an embodiment includes blocks formed by a main groove and a lateral groove on a tread portion. At least one block includes at least two sipes which divide the block into three or more sections in the tire circumferential direction. A pair of reinforcing projections which projects in the main groove is formed on both end portions of the block in the tire circumferential direction ranging from a side wall of the block to a groove bottom of the main groove. A connecting rib which connects distal end portions of the pair of reinforcing projections to each other is formed on the groove bottom of the main groove.

Abstract: The present invention provides a pneumatic tire including: a groove formed in a tread, the groove having a groove bottom and groove side surfaces arising from the groove bottom; and a projection projecting from the groove bottom, wherein the projection includes a low-step portion located at a low position with reference to the groove bottom and a high-step portion located at a high position with reference to the groove bottom, the low-step portion has a first-side inclined surface inclined in a depth direction of the groove along a first groove side surface of the groove and a second-side inclined surface inclined in the depth direction of the groove along a second groove side surface of the groove, and the first-side inclined surface and the second-side inclined surface are inclined in different directions from each other.