Bridgestone Corporation

Keiichi Hanami

Mayuko Karasawa

Tread portion of an automobile tire

A pneumatic tire includes, on a tread surface () of the tire, at least two longitudinal grooves () extending along a tire equator (C), a plurality of transverse grooves (to) connecting the longitudinal grooves, and a block row (L) formed by a plurality of blocks (to) extending along the tire equator and defined by the longitudinal grooves and the transverse grooves. Each of the blocks (to) includes a reduced thickness portion () in an overlapping region (R) where the blocks overlap in projection when the block row (L) is projected in the circumferential direction, the reduced thickness portion () including at least two portions where the thickness of the block gradually decreases.

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Kunitachi, Japan

Keiichi Hanami