Tire tread for a tire and tire and curing mould to manufacture a tire tread

A precured tread for a retread tire comprising:

• a top side configured to engage a ground surface during tire operation,
• a flat bottom side configured to bond to a flat bonding surface of a tire casing with a cushion gum,
• a tread thickness extending from the bottom side to the top side,
• a first lateral side connecting the top side with the bottom side,
• a second lateral side connecting the top side with the bottom side, wherein the first lateral side is spaced apart from the second lateral side along an axial direction,
• a plurality of grooves extending into the tread thickness from the top side and terminating within a first depth of the tire tread at a groove bottom,
• a first shoulder track limited by the top side, the bottom side and the first lateral side,
• a second shoulder track limited by the top side, the bottom side and the second lateral side,
• wherein the first shoulder track and the second shoulder track comprise a preset geometry for an improved pressure distribution when the precured tread is bonded to the tire casing and forms the retread tire,
• wherein, in an unbonded state when viewed in axial cross-section, the first shoulder track comprises a first shoulder track width and a first laterally outward portion with a reduced tread thickness with respect to the tread thickness in which this first laterally outward portion with reduced tread thickness is defined by the first lateral side, and wherein the second shoulder track comprises a second shoulder track width and a second laterally outward portion with a reduced tread thickness with respect to the tread thickness in which this second laterally outward portion with reduced tread thickness is defined by the second lateral side, and
• wherein, in the unbonded state when viewed in axial cross-section, each of the first and second lateral sides has a lower inwardly sloped surface extending from the flat bottom side to an intermediate area between the top and bottom sides, and has a upper inwardly sloped surface extending from the intermediate area to the top side, the upper sloped surface having a greater inward slope than the lower sloped surface such that each of the first and second lateral sides has a convex profile in axial cross-section.