摘要 |
PURPOSE:To suppress wandering by crossing cords of a belt layer having a specific width between plies, chamfering the surface of a shoulder section, providing cuffs on the surface, and arranging predetermined chafers between the wound-up carcass plies. CONSTITUTION:The ratio W/A between the width W of a belt layer 4 crossed with cords between plies at an angle of 15 deg.-30 deg. and the tread expansion width A is set to 0.8>W/A>0.65. Multiple cuffs 12 are provided on the surface of a chamfered shoulder section 11 at a distance (a) which is 1.0-2.0% of the tire outer diameter T. In addition, chafers 20a, 20b having a cord angle of 25 deg.-40 deg. are arranged between plies of the winding section 2a of a carcass layer so that the ratio B/C between the height B of the higher chafer and the height C of a tire cross section is set to 0.40> B/C>0.30. According to this constitution, a wandering phenomenon can be suppressed.
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