| 摘要 |
<p>The present invention relates to a pneumatic radial tire which comprises a tread, a side wall, and a bead unit, wherein a plurality of tread blocks and a plurality of grooves are formed on the tread. At least one vortex inducement protrusion unit is mutually and symmetrically arranged as putting a lateral groove inside a longitudinal groove therebetween in the vicinity of a place wherein the lateral groove and the longitudinal groove meet each other, thereby drainage performance.</p> |
