| 摘要 |
<p>It is a problem to provide a pneumatic tire where disengagement between sipe wall surfaces is suppressed. In a sipe formed in a block of a tread portion, two ridge portions (32) and (34) are formed in one sipe wall surface (29P), and two valley portions that engage with the ridge portions (32) and (34) are formed in another sipe wall surface. The two ridge portions (32) and (34) form a merged portion (30) where they merge together in the center of a sipe lengthwise direction and at their tire radial direction outside ends, and the two ridge portions (32) and (34) extend linearly from the merged portion (30) toward both sipe-lengthwise-direction end sides (F) and (K) so as to gradually move apart inward in the tire radial direction. Because of this configuration, the contact length of the adjacent sipe wall surfaces in a sipe depth direction (R) becomes longer.</p> |
