Pneumatic radial tire for passenger car and method for use thereof
A technology for radial tires and passenger cars, applied in special tires, tire parts, tire treads/tread patterns, etc., can solve the problems of handling stability, dry road braking, deterioration of braking performance, reduction of ground contact area and grip, Problems such as deterioration of wet road grip performance
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[0174] In order to demonstrate the effects of the present invention, test tires of Inventive Example 1 to Inventive Example 21 and test tires of Comparative Example 1 to Comparative Example 7 were prepared. Table 4 shows the detailed characteristics of each test tire.
[0175] In Table 4, "Negative ratio" indicates the negative ratio of the main groove; "Total length" indicates the total length of the auxiliary grooves on the tread contact surface per unit area; "Width of land portion 3a" indicates the outermost side in the tread width direction The width of the land portion in the tread width direction; and “the width of the land portion 3b” means the width of the land portion on the inner side in the tread width direction in the tread width direction. In the column of "W1 / W2", when one type of auxiliary groove extends from one end of the land portion and the other type of auxiliary groove extends from the other end of the land portion such that one type of auxiliary groove a...
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