Pneumatic tire having circumferentially extending rib with chamfers

A pneumatic tire comprising a tread and shoulders adjacent the tread, the tread comprising at least one circumferentially extending rib,

• the rib having opposed sides, laterally extending edges and circumferentially extending edges, the laterally extending edges and circumferentially extending edges contacting the ground when the tread is new and not worn wherein, circumferentially extending from the laterally extending edges and extending along the circumferentially extending edges, and connected to the rib are chamfers, the outer edge of each chamfer is convexly curved relative to the centerline of the rib the chamfers on opposed sides of the rib being circumferentially overlapping, and wherein, as the chamfers extend along the circumferentially extending edges, the rib side is gradually exposed, and
• the rib having a plurality of sipes with a density of two to eight sipes per inch (0.78–3.15 sipes per cm) wherein the sipes extend laterally into the chamfers.