OPTIMUM ARRANGEMENT OF AUTOMOTIVE TIRE WITH DIRECTIONAL STABILITY

摘要

PURPOSE:To improve steering stability and straight-forward direction stability in traveling by mounting tires in such a way that the auxiliary groove patterns of the right and left driving wheel tires are positioned convergently and those of the right and left driven wheel tires are positioned divergently. CONSTITUTION:A tire tread pattern consists of multiple main grooves 7 extending in the circumferential direction of a tire and multiple auxiliary grooves 8 roughly in the straight or curved slightly in S-shape intersecting diagonally with the main grooves 7, both of which are spaced roughly at a constant distance and in parallel, respectively. When tires are arranged, the longitudinal direction of a block surrounded by the main and auxiliary grooves 7 and 8 of the driving wheel tread pattern is aligned with the direction of a resultant force working on the tires in driving and the direction of a cord 12 of an outer belt layer 5 is aligned roughly with the longitudinal direction of the block 11.