Patent ID: 8037909

Claim:
A pneumatic radial tire with belt layers deposited under a tread and a ring-shaped water-splash control rib formed on each sidewall, wherein an upper profile of the rib is positioned above a continuation line which extends along an average profile of an outmost belt layer and which is divided into upper and lower profile of the outmost belt layer, and the height of the rib (h), which is the distance between the intersection point of the upper profile of the rib and the lateral profile of the sidewall to the farthest point of the rib from the center line of the tire, is 0.085-0.115 times the width of the tread (0.085TW≦h≦10.115TW); wherein the tire further comprises an interior angle A, which is an angle between a tangent line Le which passes through an endpoint (Pa) of the tread and which touches the upper profile and a horizontal line that is a horizontally continued line from the endpoint of the tread, and an interior angle D, which is an angle between a tangent line Ld which passes through the endpoint of the tread and which touches a lateral profile of the sidewall and the horizontal line, wherein A and D satisfy the following condition: 47°≦A≦D; and wherein the tire further comprises a height SH, which is a maximum height of the tire from the horizontal axis of the tire, and a height Dp, which is a height from a starting point of the lower profile of the rib that touches the lower profile of the rib and the lateral profile of the sidewall to the horizontal axis, wherein SH and Dp satisfy the following condition: 0.74SH≦Dp≦0.78SH.