PNEUMATIC TIRE FOR IMPROVING NOISE PERFORMANCE BY REPRESSING NOISE RESONANCE IN A GROOVE BY DIFFERING CIRCUMFERENTIALLY INCLINATION ANGLE OF BOTH SIDE WALLS OF EACH GROOVE

摘要

PURPOSE: A pneumatic tire for improving noise performance is provided to suppress the resonance of noise in a groove by changing a section shape of the groove along a circumferential direction of the tire. CONSTITUTION: A pneumatic tire for improving noise performance is composed of a tread unit(1), a side wall unit, a bead unit, and 3¯4 grooves(11,12,13) arranged continuously on the tread unit in the circumferential direction of the tire. Each inclination angle of both side walls(111,112,121,122,131,132) of the grooves is differed from each other in the circumferential direction. The inclination angles of the side walls of the grooves are continued smoothly in the circumferential direction without interruption. The inclination angles of left and right side walls correspond to each other.