| CPC B60C 11/04 (2013.01) [B60C 2011/0346 (2013.01); B60C 2011/0353 (2013.01)] | 23 Claims |
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1. A pneumatic tire, comprising:
a tread portion extending in a tire circumferential direction and having an annular shape;
a pair of sidewall portions disposed on both sides of the tread portion;
a pair of bead portions disposed on inner sides of the sidewall portions in a tire radial direction; and
a mounting direction indicator indicating a mounting direction to a vehicle,
four main grooves extending in the tire circumferential direction being formed in the tread portion,
the four main grooves comprising:
an inner center main groove located on a vehicle inner side with respect to a tire equator when the pneumatic tire is mounted on the vehicle;
an outer center main groove located on a vehicle outer side with respect to the tire equator when the pneumatic tire is mounted on the vehicle;
an inner shoulder main groove located on the vehicle inner side with respect to the inner center main groove when the pneumatic tire is mounted on the vehicle; and
an outer shoulder main groove located on the vehicle outer side with respect to the outer center main groove when the pneumatic tire is mounted on the vehicle,
five rows of land portions being defined by the four main grooves,
the five rows of the land portions comprising:
a center land portion defined between the inner center main groove and the outer center main groove;
an inner intermediate land portion defined between the inner center main groove and the inner shoulder main groove;
an outer intermediate land portion defined between the outer center main groove and the outer shoulder main groove;
an inner shoulder land portion defined on the vehicle inner side with respect to the inner shoulder main groove; and
an outer shoulder land portion defined on the vehicle outer side with respect to the outer shoulder main groove,
while a plurality of inner intermediate lug grooves extending in a tire width direction and having one ends communicating with the inner center main groove and other ends terminating in the inner intermediate land portion are formed at intervals in the tire circumferential direction in the inner intermediate land portion,
a plurality of outer intermediate lug grooves extending in the tire width direction and having one ends communicating with the outer shoulder main groove and other ends terminating in the outer intermediate land portion are formed at intervals in the tire circumferential direction in the outer intermediate land portion,
a length L1 of the inner intermediate lug groove and a length L2 of the outer intermediate lug groove satisfy a relationship L1>L2,
a distance W1 from the tire equator to a center position of the inner shoulder main groove, a distance W2 from the tire equator to a center position of the inner center main groove, a distance W3 from the tire equator to a center position of the outer center main groove, and a distance W4 from the tire equator to a center position of the outer shoulder main groove satisfying relationships 0.58≤W1/Wi≤0.62, 0.20≤W2/Wi≤0.24, 0.15≤ W3/Wo≤0.19, and 0.53≤W4/Wo≤0.57 with respect to distances Wi, Wo from the tire equator to ground contact edges on the vehicle inner side and the vehicle outer side, and
a total value of a groove width WG1 of the inner shoulder main groove and a groove width WG2 of the inner center main groove is larger than a total value of a groove width WG3 of the outer center main groove and a groove width WG4 of the outer shoulder main groove.
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