| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a tire capable of making wet performance higher than ever before by making friction resistance between water flowing through a groove and a groove surface lower than ever before. <P>SOLUTION: Small and large ribs 26 and 28 different in height and juxtaposition-direction arrangement pitch are provided on a groove surface of a main circumferential groove 14. In this case, a turbulent drag reduction effect can be exerted on water with various Reynolds numbers in comparison with the case that a plurality of ribs having heights and juxtaposition-direction arrangement pitches set constant are provided on the groove surface. Consequently, drain performance can be improved. <P>COPYRIGHT: (C)2013,JPO&INPIT |
