Patent ID: 9688104
Date: 2017-06-27
CPC Classifications: B60C,Y02T

Claim:
1. A pneumatic tire comprising: a tread portion provided with a plurality of circumferentially extending main grooves, wherein the main grooves consist of a central main groove extending on a tire equator and a pair of shoulder main grooves disposed one on each side of the central main groove, and a plurality of lateral grooves, to form a plurality of block rows each of which includes a plurality of tread blocks, the three main grooves having a same width, each of the tread blocks including a ground contact surface having a polygonal shape which has at least five sides and of which each interior angle is not less than 90 degrees, the ground contact surface of each of the tread blocks including a maximum axial width W the tread blocks comprise (i) a plurality of inner tread blocks between the central main groove and each of the shoulder main grooves and (ii) a plurality of outer tread blocks between each of the shoulder main grooves and an adjacent tread edge of the tread portion, the ground contact surface of each of the inner blocks is formed into an approximately hexagonal shape with six sides, and the ground contact surface of each of the outer blocks is formed into an approximately pentagonal shape with five sides.