Patent ID: 9162534
Filing Date: 2015-10-20
Classification: B60C

Abstract:
1. A pneumatic tire having a designated rotational direction comprising a tread portion, a pair of center circumferential main grooves extending on both sides of a tire equatorial plane of the tread portion, a center land portion between the center circumferential main grooves, a sipe provided on the center land portion, a plurality of V-shaped grooves each provided separately in the circumferential direction of the tire on the center land portion to form a plurality of V-shaped blocks, each said V-shaped groove comprising a peak located in a middle area of the center land portion, a first inclined portion extending from the peak to one side edge of the center land portion, and a second inclined portion extending from the peak to the other side edge of the center land portion, each of said V-shaped blocks being provided with a first inclined sub-groove and a second inclined sub-groove, the first inclined sub-groove extending from the one side edge of the center land portion toward the tire equatorial plane having the same inclined direction with the first inclined portion, the second inclined sub-groove extending from the other side edge of the center land portion toward the tire equatorial plane having the same inclined direction with the second inclined portion, the first inclined sub-groove and the second inclined sub-groove being provided separately in the circumferential direction of the tire, and a width of the center land portion being in a range of from 15% to 21% of a tread width.