Pneumatic Tire

摘要

In a pneumatic tire, land portions have a plurality of sipes and at least one row of land portions in an inner side region is provided with sipes having a 3D structure. Also, the snow traction index (STI) with respect to the tire circumferential direction throughout the entire tread portion is in the range of 100≦STI. Also, the sipe component (STI_s_out) of the snow traction index (STI) in an outer side region and the sipe component (STI_s_in) of the snow traction index (STI) in the inner side region have the relationship of 1.1≦STI_s_in/STI_s_out. Also, the peripheral length ratio PLR_out of the three-dimensional structure portion in the outer side region and the peripheral length ratio PLR_in of the three-dimensional structure portion in the inner side region have the relationship of 1.1≦PLR_in/PLR_out.

主权项

1. A pneumatic tire, comprising: a plurality of circumferential main grooves extending in a tire circumferential direction; and a plurality of land portions partitioned by the circumferential main grooves in a tread portion,
a first region in the tread portion bordered by the tire equatorial plane being an inner side region, and a second region being an outer side region, the land portions respectively having a plurality of sipes, and the land portion of at least one row in the inner side region being provided with sipes having a three-dimensional structure portion, a snow traction index STI in the tire circumferential direction throughout the entire tread portion being in a range of 100≦STI, a sipe component STI_s_out of the snow traction index STI in the outer side region and a sipe component STI_s_in of the snow traction index STI in the inner side region having a relationship of 1.1≦STI_s_in/STI_s_out, and a peripheral length ratio PLR_out of the three-dimensional structure portion in the outer side region and a peripheral length ratio PLR_in of the three-dimensional structure portion in the inner side region having a relationship of 1.1≦PLR_in/PLR_out.