| 主权项 |
1. A pneumatic radial tire for passenger cars, provided with a pair of bead portions, a carcass formed by a ply of radial cords toroidally extending between the bead portions, and a tread, comprising:
a section width W and an outside diameter L such that a ratio W/L is 0.24 or less; a tread edge main groove in at least half of a surface of the tread divided by a tire equatorial plane, the tread edge main groove being adjacent to a tread edge, separated from the tread edge in a tread width direction by a distance of at least 25% of a tread width TW, and extending in a tread circumferential direction; and at least one transverse groove in an adjacent land portion adjacent to a tread edge land portion defined by the tread edge main groove and the tread edge, the at least one transverse groove extending from the tread edge main groove in the tread width direction and terminating within the adjacent land portion, wherein the at least one transverse groove is provided in only one of the halves of the pneumatic radial tire in the tread width direction, and wherein the at least one transverse groove comprises a plurality of transverse grooves at intervals in the tread circumferential direction of E/2 (mm) or less, where E is a contact length of the tire in mm. |
