Tire

A tire comprising:

• a tread portion comprising a circumferential groove and a land portion defined by the circumferential groove, the land portion comprising a land sidewall facing the circumferential groove,
• the land sidewall comprising a first surface, a second surface located on a groove centerline side of the circumferential groove with respect to the first surface, and a stair portion formed between the first surface and the second surface, wherein
• the stair portion varies its radial height stepwise in two or more steps in a longitudinal direction of the circumferential groove,
• the land portion comprises a plurality of circumferentially arranged blocks divided by lateral grooves,
• the plurality of blocks comprising a first block and a second block which are adjacent in a tire circumferential direction of the tire through one of the lateral grooves,
• the stair portion is provided on an inner side of the first block and on an inner side of the second block in the tire axial direction,
• the stair portion provided on the first block descends toward the one of the lateral grooves, and
• the stair portion provided on the second block descends toward the one of the lateral grooves.