Pneumatic tire

A pneumatic tire mounted on a vehicle in a specified direction, the pneumatic tire comprising a tread rubber on a tread, and

• the tread rubber comprising:
• a plurality of main grooves that extend along a tire circumferential direction,
• a pair of shoulder land portions that are defined by the main grooves and arranged on outer sides in a tire axial direction, and
• a center rib that is located between the pair of shoulder land portions, the center rib being continuous in the tire circumferential direction, wherein the tread rubber has a storage modulus at −25° C. (−25° C. E′) of 60 MPa or more and 150 MPa or less;
• wherein the center rib includes:
• a first center rib located on an inner side of the vehicle relative to a tire equator, and
• a second center rib located on an outer side of the vehicle relative to the tire equator, and
• a plurality of sipes formed in and crossing the first center rib at intervals in the tire circumferential direction, a plurality of sipes formed in and crossing the second center rib at intervals in the tire circumferential direction,
• wherein each sipe of the plurality of sipes crossing the first center rib has a curved portion that protrudes to one side in the tire circumferential direction relative to positions of both ends of the sipe in the first center rib in the tire circumferential direction in a plan view of the first center rib;
• wherein each sipe of the plurality of sipes crossing the second center rib is generally S-shaped in the plan view of the second center rib;
• and
• wherein a number of sipes crossing the second center rib is smaller than a number of sipes crossing the first center rib.