Tire tread with a bottom groove and a reinforcing structure with angles

A tire tread comprising:

• a first tread element with a first radially outermost surface, a second tread element with a second radially outermost surface, said first groove between the first tread element and the second tread element, said first groove comprising a first section and a second section;
• wherein the first section comprises a side surface which extends from the first radially outermost surface and which is inclined with respect to the first radially outermost surface of a first inclination angle, wherein a curved bottom portion is joined to the side surface;
• and
• wherein the second section comprises:
• i. a radially outermost portion with an inclined surface, which is inclined with respect to the first radially outermost surface of a second inclination angle, which is less than the first inclination angle, the first inclination angle and the second inclination angle exhibiting an inclination difference ranging from 20° to 80°;
• ii. a radially innermost portion with a passage extending toward the first section, wherein the passage has a circular cross-sectional shape;
• iii. a slit portion radially connecting the radially innermost portion to the radially outermost portion, said slit portion having a width less than the passage;
• a third tread element, and a circumferential groove between the first tread element and the third tread element, each of the first tread element and the third tread element comprises a groove surface demarcating the circumferential groove, each groove surface comprising two protrusions and a recess between the two protrusions, one of the two protrusions of the first tread element axially projecting within the recess of the third tread element.