PNEUMATIC RADIAL TIRE FOR PASSENGER CAR

A pneumatic radial tire for a passenger vehicle, having a carcass constituted of a carcass ply provided to extend in a toroidal shape across a pair of bead portions and a tread rubber provided on the outer side in the tire radial direction of the carcass, wherein: provided that SW and OD represent cross sectional width and outer diameter of the tire, respectively, and that the tire assembled with a rim is inflated at an internal pressure of at least 250 kPa, SW/OD (a ratio of SW with respect to OD of the tire) is ≤ 0.26 when SW < 165 (mm); SW and OD satisfy a formula OD ≥ 2.135 x SW + 282.3 when SW ≥ 165 (mm) and; dynamic storage elastic modulus E' of the tread rubber at 30°C is in the range of 6.0 MPa to 12.0 MPa.