Tire Tread Groove Phasing for Lower Pitch Noise

The patent applies asymmetry by arranging lateral groove-shaped elements with different orientations on different land portions. Specifically, on one land portion, lateral grooves are inclined at a first angle relative to the tire axial direction, while on another land portion, lateral grooves are inclined at a second angle that is different from the first angle. This asymmetric arrangement causes the ends of lateral groove-shaped elements to be distributed non-uniformly in the tire circumferential direction, reducing concentration of impact forces and thereby suppressing pitch noise while maintaining drainage performance through the inclined groove structures

The patent applies local quality by providing lateral groove-shaped elements with different inclinations on different land portions rather than using a uniform arrangement across the entire tread. Each land portion has locally optimized groove characteristics - some areas have grooves inclined at steeper angles for noise reduction, while other areas have grooves at shallower angles to maintain steering stability. This localized variation allows the tire to achieve both noise suppression and stable steering performance by optimizing different regions for different functions