A pneumatic radial tire including a carcass; two belt reinforcing layers; and a belt formed by two belt layers. A width of a belt cord intersecting region defined by the two belt layers is set in the range of 65 to 90% of the tire width-W, the maximum width of the belt reinforcing layer is set in the range of 60 to 85% of the tire width. Also, a belt radius ratio, which is a ratio of difference between the radius of the belt at the tire equatorial plane and the radius of the belt at a belt side end position thereof measured from the tire axis in a state where the tire is inflated at the standard inner pressure, with respect to a belt half width, is not larger than 0.06.