BLOCKS FOR PNEUMATIC TIRES AND PNEUMATIC TIRES EMPLOYING SUCH BLOCKS IN TREADS

摘要

BLOCKS FOR PNEUMATIC TIRES AND PNEUMAATIC TIRES EMPLOYING SUCH BLOCKS IN TREADS A block for the pneumatic tire has a substantially rectangular contour as a whole, a ratio of the width of the block to that of a tread in a range of 0.10 to 0.30, and a ratio of the length of the block to the width of the tread in a range of 0.075 to 0.250. At least a wall of the block on a stepping-in side is inclined in a range of 10.degree. to 45.degree. relative to a meridian line of the tire. The surface of the block is provided with a single sipe opening at widthwise opposite side edges of the block. The widthwise projected length "b" of that portion of the sipe which is located on the stepping-in side while not overlapping the other portion is set at not more than 0.35"a" in which "a" is an entire length of the sipe projected in a width direction of the tread.