Tire tread

A pneumatic tire comprises shoulders adjacent to a tread. The tread comprises a circumferentially extending rib (10) in a central region and several steeply slanted grooves inclined at an angle relative to the circumferential direction of the tire in each pair of opposing side regions. The rib has several sipes (12) of density 2-8 sipes/inch extending across the full width of the rib. The sipes extend into a chamfer (28). A pneumatic tire comprises shoulders adjacent to a tread. The tread comprises a circumferentially extending rib (10) in a central region and several steeply slanted grooves inclined at an angle relative to the circumferential direction of the tire in each pair of opposing side regions. The rib has several sipes (12) of density 2-8 sipes/inch extending across the full width of the rib. The sipes extend into a chamfer (28). The grooves initiate at the junction of the central region and the side regions and terminate in the shoulders forming circumferential tread blocks. The blocks extend from the central region to the shoulders and have several sipes. The spacing between adjacent sipes increases toward the tread shoulders. The tread has a greater sipe density in the central region of the tire than in the side regions.