| 摘要 |
PROBLEM TO BE SOLVED: To achieve both of wet performance and stability at higher level.SOLUTION: A pneumatic tire comprises middle ribs and shoulder ribs which are divided into shoulder main grooves and crown main grooves. The shoulder ribs comprise shoulder lug grooves extending from a ground contact end side to inside of a tire axial direction, and shoulder sipes extending from the shoulder main grooves to outside of the tire axial direction. The middle ribs do not comprise a lug groove, and comprise outside middle sipes extending from the shoulder main grooves to inside of the tire axial direction and inside middle sipes extending from the crown main grooves to outside of the tire axial direction. Each corner part between each tread of the middle rib and each groove wall surface of the shoulder main groove, has a triangular chamfer part extending from each outside middle sipe. The outside middle sipe is along a virtual extension line of the shoulder siping and has 5 mm or less of circumferential distance from the virtual extension line. The shoulder sipe, the outside middle sipe, and an inner lug groove part of the shoulder lug groove have respectively an angle of 70-80 degree to the circumferential direction. |
