RADIAL TIRE FOR HEAVY LOAD

摘要

PURPOSE:To improve the wandering performance of the captioned tyre for truck or the like by forming a rubber base material in a trapezoidal shape and with a specified thickness, and specifying the pulling force ratio of a rubber cap material to the rubber base material. CONSTITUTION:A rubber base member 1b is formed like a trapezoid in section, and the rubber thickness dominating in a tread is made to be one third or more at a tread center part (c) and one fifth or less at the one fourth point (g) of the tread width. Meanwhile the ratio of 300% pulling force of a rubber cap material 1b to the rubber base material 1a is set within three tenth through eight tenth. It is thus possible to improve the wondering performance of a tire maintaining the control stability and fuel saving performances.