| 摘要 |
PURPOSE: To enhance operating stability on high speed cornering driving by forming a tread of a front wheel tire in a negative ratio in which right and left are practically equal against an equatorial plane and forming a tread in a rear wheel tire in a asymmetrical pattern. CONSTITUTION: In a tire having a belt layer and a tread on an outer circumference of a crown part of a toroidal radial carcass, and having a large number of main grooves 3 and lands 4 divided by the main grooves 3 in the tread, the tread 4 of a front wheel tire 2F is formed of rubber having a Shore A hardness of 58-70 deg., a tanσof 0.04-0.57, and by a negative ration in which right and left are practically equal against an equatorial plane. In the other hand, the tread 4 of a rear wheel tire 2R is formed of rubber having a Shore A hardness of 60-75 deg., a tanσof 0.43-0.60, and by an asymmetrical pattern in which a negative ratio has a smaller ratio of an inner region to an outer region of an equatorial plane of the tire. |
