PNEUMATIC RADIAL TIRE FOR PASSENGER VEHICLE

摘要

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×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.

主权项

1. A pneumatic radial tire for a passenger vehicle, having a carcass constituted of a carcass ply made of radially-disposed cords 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 the cross sectional width SW (mm) with respect to the outer diameter OD (mm) of the tire) is ≦0.26 when SW<165 (mm); SW and OD satisfy a formula shown below when SW≧165 (mm); OD≧2.135×SW+282.3 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.