A pneumatic tire comprises a tread rubber disposed radially outside a tread reinforcing belt, the tread rubber includes a radially outmost cap tread rubber and a radially inner base tread rubber, wherein the base tread rubber includes a central base tread rubber centered on the tire equator and a side base tread rubber disposed on each side of the central base tread rubber, and the tread rubber having one of the following hardness distributions (a) and (b): (a) the side base tread rubber is hardest in the tread rubber, and the cap tread rubber has a hardness of from 53 to 63 degrees, the central base tread rubber has a hardness of from 45 to 60 degrees, and the side base tread rubber has a hardness of from 65 to 75 degrees; (b) the side base tread rubber is softest in the tread rubber, and the cap tread rubber has a hardness of 60 to 80 degrees, the central base tread rubber has a hardness of from 65 to 75 degrees, and the side base tread rubber has a hardness of from 45 to 60 degrees.

 
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