Siping geometry to delay the onset of rib edge wear in truck tires

A tire tread for a tire having a carcass, a central crown area radially outside said carcass and a belt package, said tire tread being arrangeable radially outside of said belt package, said tire tread comprising:

• a plurality of circumferentially extending ribs, each rib having opposed lateral sides and an outer surface of selected width, the outer surface joining the opposed lateral sides at opposed edges;
• a plurality of generally circumferentially extending grooves having a selected depth formed between adjacent ribs;
• each rib having a plurality of sipes formed therein to a sipe depth measured radially inward from the outer surface and to a sipe length greater than 4 mm and less than 8 mm measured perpendicular to the lateral sides, the sipes being circumferentially spaced along each of the opposed edges at a distance greater than 4 mm and less than 6 mm, each sipe extending into a respective rib to said sipe depth at an angle of inclination greater than about 5° and less than 15° relative to the radial direction, and each sipe forming an angle with respect to a circumferential direction of said tire tread greater than about 55 degrees and less than 90 degrees.