Tire with variable width grooves

A tire comprising:

• a carcass ply;
• a pair of sidewalls;
• a circumferential belt;
• and
• a circumferential tread including:
• a plurality of main circumferential grooves and a plurality of discrete road-contacting land portions, wherein at least one main circumferential groove is a zigzag circumferential groove having a constant depth and substantially sinusoidal groove edges, wherein the frequency of the sinusoidal waves of a first pair of groove edges of a first groove segment differs from the frequency of the sinusoidal waves of a second pair of groove edges of a second groove segment, with a point height of the zigzag circumferential groove, PH, such that 3.86<PH<2750, wherein:
• PH
• =
• AW
• SW
• ×
• 100
• ⁢
• ⁢
• AR
• ×
• R
• where PH=point height,
• where AW=a maximum axial width of a circumferential groove (in millimeters),
• where SW=a section width of the tire (in millimeters),
• where AR=a aspect ratio of the tire, wherein 0<AR≤1, and
• where R=a radius of a rim of the tire (in inches).

A tire comprising:

• a pair of sidewalls;
• a circumferential tread including:
• a zigzag circumferential groove defined by a groove bottom, a pair of groove walls, and a pair of groove edges defining an intersection between each groove wall and a top surface of the circumferential tread, wherein each of the groove edges smoothly widens and narrows along a segment of the zigzag circumferential groove in relation to the groove bottom, and wherein a depth of the zigzag circumferential groove is constant along the segment of the zigzag circumferential groove,
• a first circumferential pitch with a first circumferential pitch length and a second circumferential pitch with a second circumferential pitch length different from the first circumferential pitch length,
• wherein the first circumferential pitch includes a first zigzag circumferential groove segment and a second zigzag circumferential groove segment that form a first intersection angle, and
• wherein the second circumferential pitch includes a third zigzag circumferential groove segment and a fourth zigzag circumferential groove segment that form a second intersection angle different from the first intersection angle;
• and
• wherein the groove edges of each of the groove segments is substantially sinusoidal, and wherein the frequency of the sinusoidal waves of the edges of the third and fourth groove segments differs from the frequency of the sinusoidal waves of the edges of the first and second groove segments.