| 摘要 |
Provided is a narrow-width, large-diameter radial tire which is a passenger-vehicle pneumatic radial tire with improved wet performance and rolling resistance performance. When the passenger-vehicle pneumatic radial tire of the disclosure is assembled to a rim and filled with an internal pressure of 250kPa or more, an SW/OD ratio of a sectional width SW to an outer diameter OD(mm) of the tire is 0.26 or less if the tire has a sectional width SW of less than 165(mm), whereas a sectional width SW and an outer diameter OD(mm) of the tire satisfy a relation of 2.135 ×SW+282.3‰¤OD if the tire has a sectional width SW of 165(mm) or more, a dynamic storage modulus E' at 30°C of the tread rubber is 6.0MPa to 12.0MPa and a loss tangent tan´ at 60°C of the tread rubber is 0.05 to 0.15, and a dynamic storage modulus E' at 30 °C of the buttress rubber is 1/2 or less, and a loss tangent tan´ at 60°C of the buttress rubber is 0.1 or less. |
