Patent ID: 8991451
Filing Date: 2015-03-31
Classification: B60C

Abstract:
1. A pneumatic tire comprising: a tread portion; a plurality of main grooves extending in a tire circumferential direction on the tread portion, wherein two of said main grooves that are located in outermost positions in a tire width direction are defined as outer main grooves, at least four ribs sectioned by the main grooves on the tread portion; a plurality of open sipes, each formed across both edge portions of the rib, the open sipes being formed on each of the ribs; and a plurality of multisipes, each formed on one of the edge portions of the rib, the multisipes being formed on only each of the ribs between which the outer main grooves are positioned, the multisipes being aligned along the edge portion of the rib, wherein center positions of the open sipes are oblique to the tire circumferential direction, wherein the center portion of one of the open sipes in a pair adjacent to each other formed on the same rib is oblique to the tire circumferential direction at an oblique angle θ, and an angle formed by the open sipe oblique to the tire circumferential direction at the oblique angle θ and the center portion of the other open sipe of the open sipes is a relative angle φ, wherein the oblique angle θ is within a range of 50°≦θ≦70° and the oblique angle φ is within a range of 30°≦φ≦50°, and wherein end portions of the open sipes are orthogonal to the edge portion of the rib.