| 摘要 |
The present invention provides a pneumatic tire with wetting road performance and operation stability in a high level, comprising a middle rib and a tire shoulder rib divided by a tire shoulder tap drain and a crown tap drain. The tire shoulder rib has a tire shoulder cross groove extending insides from the grounding end side to the tire axis direction, and a tire shoulder siping extending outsides from the tire shoulder main groove to the axis direction of the tire. The middle rib does not have the cross groove, and has an outside middle siping extending insides from the tire shoulder tap drain to the axis direction of the tire, and an inside middle siping extending outsides from the crown tap groove to the axis direction of the tire. The corner portion of the groove wall surface of the tap shoulder tap groove and the tread of the middle rid is provided with a triangular inversed angle portion extending from the outside middle siping. The outside middle siping is along an imaginary extension cord of the tire shoulder siping, and the circumference distance to the imaginary extension cord is less than 5mm. The inner cross groove portions of the tire shoulder siping, the outside middle siping and the tire shoulder cross groove has a circumference angle of 70 degrees to 80 degrees. |
