| 摘要 |
PURPOSE:To improve wandering performance keeping wet performance warranted by constituting a pneumatic radial tire such that one of a pair of the right and left edges adapts to the edge of a rain group road face, and the phase of the other edge is made to shift in the axial direction of the tire. CONSTITUTION:While traveling on a rain group road face, water displacing performance is secured by a right and a left straight grooves. In a protruded tread 20, either edge 23L or 24L (23R or 24R in the R side), that is, the edge of a first shoulder block 122A is adapted to either edge 25L or 25L of the rain groove road face, that is, the edge of a first center block 121A. The other edges 23L and 24L, that is, the edges of a second to fourth shoulder blocks 122B to 122D and the edges of a second to fourth center blocks 121B and 121C have a taper angle of about 2 deg. as shown by an angle of theta in the axial direction of a tire, and the phase is shifted. |
