| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire can concurrently gain controllability and stability on a dry road surface and on-snow performance on a snowy road surface. SOLUTION: The pneumatic tire includes blocks 4a arranged circumferentially side by side in a line of the tire by a plurality of circumferential main grooves 3 extending circumferentially along the tire and a plurality of lug grooves 5 intersecting circumferentially along the tire on the tread surfaces 21 of a tread portion 2. The pneumatic tire further has fine-grooved sipes 6 provided in an intersecting manner in the circumference of the tire on the tread surfaces 21 of the blocks. At least on the block mounted on the utmost external side in the width direction of the tire among the circumferential main grooves, the lug groove is provided in a bending manner having a bending point 5a within the range of 50% in the middle of the width of the block in the width direction of the tire. The respective anglesθwith respect to the circumference of the tire on both sides in the width direction of the tire, being separated by the bending point, are set within a range of 30≤θ≤80 [degrees]. One edge of each of the sipes penetrates the circumferential main groove and the other is positioned within the range of 50% in the middle of the width of the block in the width direction of the tire. COPYRIGHT: (C)2009,JPO&INPIT |
