Pneumatic tire for construction vehicle

摘要

An object of the present invention is to provide a pneumatic tire for a construction vehicle capable of suppressing deterioration in heat release property while maintaining high wear resistance especially when used as driving wheels. A central area 20 is provided with a central narrow groove 21 continuously extending along a tire circumferential direction in a zigzag form. Each side area 30 is provided with a side narrow groove 32. A width direction narrow groove 22 is provided The central narrow groove 21, the side narrow grooves 32 and the width direction narrow grooves 22 define plural polygonal block land portions 23 having five or more straight sides in the tread portion 10. The block land portions are lined in the tire circumferential direction to form two block arrays arranged next to each other.

主权项

1. A pneumatic tire for a construction vehicle having a tread divided into a central area and two side areas located at both sides of the central area in a tire width direction, and a plurality of lug grooves arranged in each of the side areas, wherein
the central area is provided with a central narrow groove continuously extending along the tire circumferential direction in a zigzag form and formed by alternately connecting a first inclined groove portion extending at a predetermined angle with respect to a tire circumferential direction and a second inclined groove portion extending in the same circumferential direction but opposite widthwise direction at an opposite angle to the first inclined groove portion with respect to the tire circumferential direction; each of the side areas is provided with a side narrow groove passing through a tire width direction inner side portion of each of the lug grooves and extending in the tire circumferential direction; the tire width direction inner side portion of each of the lug grooves is arranged to face a proximate joint portion of joint portions of the first inclined groove portion and the second inclined groove portion in the tire width direction; a width direction narrow groove is provided between the tire width direction inner side portion of each of the lug grooves and the proximate joint portion; and, the central narrow groove, the side narrow grooves and the width direction narrow groove define a plurality of polygonal block land portions having five or more sides in the tread portion, the block land portions being lined in the tire circumferential direction to form two block arrays arranged next to each other.