| 摘要 |
Provided is a pneumatic tire capable of improving on-snow performance and anti-wear performance. A pneumatic tire in which four principal grooves delimit one row of center ribs 21, two rows of intermediate ribs 22, and two rows of outside ribs 23, wherein: a plurality of compound grooves 30 comprising horizontal grooves 31, one end of which connects to a principal groove 10 on one side thereof and the other end of which ends inside a rib 20, and further comprising sipes 32 extending from the other end of the horizontal groove 31 to a principal groove 10 on the other side thereof, are formed at an interval from one another in the tire-circumferential direction in any one of the center rib 21 and the intermediate ribs 22; the compound grooves 30 are positioned in a manner such that the opening direction of the horizontal grooves 31 relative to the principal grooves 10 alternatingly reverses in the tire circumferential direction; and a wide section 31a opening to a principal groove 10 and extending at a constant groove width, and a narrow section 31b positioned between the wide section 31a and the sipe 32 and extending at a constant groove width narrower than that of the wide section 31a are formed in each of the horizontal grooves 31. |
