PURPOSE: To improve the deflection abrasion resistance and high speed durability without deteriorating comfortableness performance, as for a radial tire having a belt layer B consisting of a plurality of layers and having a flat ratio of a specific value % or less.

CONSTITUTION: The cord angle β2 of at least one belt B3 between a belt having the largest width and a belt having the next larger width, e.g. the second belt B2 and the third belt B3, for the tire circumferential direction at the belt edge part b2 is set smaller than the cord angle β1 at the crown center part b1. Having the position in nearly 1/4 of the crown width from the crown center, as angle change point, the cord angle β2 at the belt edge part on the outer side from the angle change point is set smaller than the cord angle β1.