Pneumatic tire

A pneumatic tire having an asymmetrical tread pattern on both sides of a tire center line and a designated vehicle mounting direction, the pneumatic tire comprising:

• in a tread portion,
• a plurality of main grooves extending in a tire circumferential direction;
• a plurality of ribs defined by the main grooves, including a center rib disposed on a tire center line;
• and a plurality of sipes that extend in a tire lateral direction in each rib of the plurality of ribs, the plurality of sipes including sipes in a ground contact region on a vehicle mounting inner side and sipes in a ground contact region on a vehicle mounting outer side;
• each sipe of the plurality of sipes comprising a leading-side edge and a trailing-side edge, each leading-side edge and each trailing-side edge being provided with only a single chamfered portion, the chamfered portion having a length shorter than a length of the each sipe, and being provided with only a single non-chamfered region, where the chamfered portion of the leading-side edge is not disposed in an area opposite the chamfered portion of the trailing-side edge, the chamfered portion of the leading-side edge and the chamfered portion of the trailing-side edge comprising chamfered portions of the each sipe;
• the each sipe in the center rib having one end opening in one of the main grooves on the vehicle mounting inner side and the other end terminating in the center rib without reaching the tire center line;
• the each sipe having a maximum depth x (mm) and the chamfered portion having a maximum depth y (mm) that satisfy a relationship represented by x×0.1≤y≤x×0.3+1.0;
• the each sipe having a constant width in a range from an end portion of the chamfered portion positioned inward in a tire radial direction to a groove bottom of the sipe;
• and
• the plurality of sipes being configured so that an inner side total groove area ratio of the chamfered portions of the sipes included in the ground contact region on the vehicle mounting inner side and of the sipes included in the ground contact region on the vehicle mounting inner side is greater than an outer side total groove area ratio of the chamfered portions of the sipes included in the ground contact region on the vehicle mounting outer side and of the sipes included in the ground contact region on the vehicle mounting outer side, the inner side total groove area ratio being with respect to a total ground contact area of the ground contact region on the vehicle mounting inner side of the tread portion and the outer side total groove area ratio being with respect to a total ground contact area of the ground contact region on the vehicle mounting outer side of the tread portion.