LARGE SIZE PNEUMATIC RUBBER TIRE FOR ROUGH ROADS

摘要

A large size pneumatic rubber tire for bad or rough roads comprises a number of main grooves in a tread of the tire arranged on both sides of a center circumferential line of the tread and in parallel with one another substantially equally oblique to the center circumferential line and a number of auxiliary grooves in the tread substantially in parallel with one another oblique in a direction opposite to the direction of the main grooves to connect the two main grooves adjacent in a circumferential direction. The main and auxiliary grooves have comparatively wide groove widths, respectively, and divide the tread into a center zone and two side zones. These zones respectively consist of circumferentially arranged respectively substantially same shaped center blocks and side blocks defined by the main and auxiliary grooves. The tire according to the invention can effectively eliminate extraordinary temperature rise in the tire without sacrificing the required performances such as wear-resistance, even if under severe operating conditions.