Pneumatic radial tire

A pneumatic radial tire, comprising:

• a tread portion extending in a tire circumferential direction and having an annular shape;
• a pair of sidewall portions disposed on both sides of the tread portion;
• and
• a pair of bead portions disposed on an inner side of the sidewall portions in a tire radial direction,
• the pneumatic radial tire comprising:
• a carcass layer mounted between the pair of bead portions;
• a plurality of belt layers disposed on an outer circumferential side of the carcass layer in the tread portion;
• and a belt cover layer disposed on an outer circumferential side of the belt layers,
• the belt layers being formed of steel cords in a N+M structure in which a number of wire strands N of an inner layer is 2 to 4 and a number of wire strands M of an outer layer is 2 to 7, and in which a twist direction of the inner layer is different from a twist direction of the outer layer, the steel cords being arranged inclined with respect to the tire circumferential direction to intersect each other in layers of the belt layers, and
• the belt cover layer being formed of organic fiber cords having elongation of 2.0% to 4.0% under 2.0 cN/dtex load, the organic fiber cords being wound spirally along the tire circumferential direction.