| 摘要 |
PURPOSE: A pneumatic tire having a multiple tread is provided to divide a tread part into central, inner, and outer parts with centering on the center of the tread, to grasp characteristics necessary for each part and produce tread rubber from rubber compositions to each characteristic, and accordingly to improve the capacity of the tire. CONSTITUTION: A pneumatic tire having a multiple tread and undirected patterns(4) at inner and outer parts(2,3) of the tread about a center(1) of the tread has at least two treads. The inner part of the tire having 0.5¯45% width for a full width(10) of the tire tread is made from tread rubber compositions having excellent tractive ability for wet road surfaces. The outer part having 0.5¯45% width for the full width of the tire tread is made from tread rubber compositions having excellent braking performance. A central part except for the inner and outer parts of the tread is made from the tread rubber compositions having excellent wear resistance.
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