PURPOSE: To reduce the weight and rolling resistance, improve the molding productivity, durability at a high speed, and control stability, by setting the inclination directions of first belt layer cord of tires mounted on right and left sides in the advancing direction respectively right rearward and left rearward.
CONSTITUTION: A first belt layer 2 of single layer consisting of steel cord 2a of which cord angle against the circumferential direction of a tire is 45°-65° is arranged on the tread part on the outside of a carcass layer, and a second belt layer consisting of aromatic polyamide fiber cord of which cord angle is actually 0° is arranged on the outside of the former. In such a tire, the tire 20 mounted on the right side wheel in the advancing direction viewing from over side is constituted so that the cord inclination direction of the first belt layer 2 on the sky side is set right rearward in the advancing direction. The tire 21 mounted on the left side wheel in the advancing direction is constituted so that the cord inclination direction of the first belt layer 2 on the sky side is set left rearward in the advancing direction. Consequently, the molding productivity can be improved while reducing the weight of tire, and the control stability can be improved by reducing the rolling resistance.
KANEHIRA NAOKI
AIKAWA KOICHIRO
