| 摘要 |
PROBLEM TO BE SOLVED: To provide a narrow-width, large-diameter pneumatic radial tire for a passenger car that is improved in wet performance and roll resistance performance.SOLUTION: When a rim is incorporated in a tire 1 and internal pressure is 250 kPa or larger, a ratio SW/OD of a sectional width SW of the tire to an external diameter OD (mm) satisfies 0.26 or less for a sectional width SW of 165 (mm) or less, and 2.135×SW+282.3≤OD for a sectional width SW of 165 (mm) or larger. Tread rubber has a dynamic storage elastic modulus E' of 6.0-12.0 MPa and a loss tangent tanδ of 0.05-0.15. A plurality of sipe 9 are arranged at at least one land part 8 to a predetermined pitch length L, and 0.6 W≤Ws≤1.2 W and L≤Ls≤3 L hold for a land width W, a tire width-directional sipe component total length Ws of sipes within a range of one pitch length L, a pitch length L, and a tire periphery-directional sipe component total length Ls of sipes within the range of one pitch length L.SELECTED DRAWING: Figure 2 |
