Patent ID: 6058997
Filing Date: 2000-05-09
Classification: B60C,Y10T

Abstract:
A pneumatic radial tire having at least three belt layers disposed at a tread portion, characterized in that two of said at least three belt layers are constituted by inclining a strip formed by aligning a plurality of reinforcing cords relative to a tire circumferential direction and extending said strip zigzag in the tire circumferential direction in such a fashion that said strip is turned back from the inner belt layer to the outer belt layer at both end portions of said belt layers, zone portion in which said reinforcing cords incline to the left in the tire circumferential direction and zone portions in which said reinforcing cords incline to the left in the tire circumferential direction are alternatively disposed in the tire circumferential direction, and one belt layer having a large number of steel cords arranged at an angle .alpha. of inclination of 5 to 65 degrees relative to the tire circumferential direction is disposed inside said two belt layers so that both end portions of said one belt layer are covered by said two belt layers.