Sidewall shear decoupling layer

A pneumatic tire, comprising:

• a tread supported by a crown, the crown being positioned radially-inward of the tread;
• a pair of sidewalls, each sidewall extending radially-inward from an axial edge of the crown, each sidewall defining aside of the tire;
• a pair of beads, each bead having a circumferentially-inextensible bead core defining a bead core center, each bead positioned radially-inward of each sidewall respectively;
• a carcass layer constructed from a plurality of radially-oriented carcass layer cords embedded in an elastomeric matrix and extending through the crown and between the beads, the carcass layer having a pair of carcass layer ends, each end being anchored in each bead respectively;
• one or more crown plies disposed radially-inward of the tread and radially-outward of the carcass layer and extending between the sidewalls of the tire;
• a pair of shoulder section shear layers, one of the pair located at each sidewall respectively and each positioned on at least one axial side of the carcass layer, the shoulder section shear layers extending from the sidewall to a position radially-inward of the crown ply by a predetermined distance d from an axial edge of the crown ply;
• a pair of bead section shear layers, one of the pair located at each sidewall respectively and each positioned on at least one axial side of the carcass layer, the bead section shear layers extending from the sidewall to a position located at a predetermined distance h from the center of the bead core in a direction perpendicular to an axial direction of the tire,
• wherein one or more of the pairs of shoulder section and bead section shear layers are constituted of an elastomer composition having a modulus of elongation measured at 10% (MA10) of no greater than 110% of an MA10 selected as a lowest MA10 of all elastomer compositions constituting the sidewall components that are positioned axially-outward of an axially-inward side of the carcass layer.

A pneumatic tire, comprising:

• a tread supported by a crown, the crown being positioned radially-inward of the tread;
• a pair of sidewalls, each sidewall extending radially-inward from an axial edge of the crown, each sidewall defining a side of the tire;
• a pair of beads, each bead having a circumferentially-inextensible bead core defining a bead core center, each bead positioned radially-inward of each sidewall respectively;
• a carcass layer constructed from a plurality of radially-oriented carcass layer cords embedded in an elastomeric matrix and extending through the crown and between the beads, the carcass layer having a pair of carcass layer ends, each end being anchored in each bead respectively;
• one or more crown plies disposed radially-inward of the tread and radially-outward of the carcass layer and extending between the sidewalls of the tire;
• a pair of shoulder section shear layers, one of the pair located at each sidewall respectively and each positioned on at least one axial side of the carcass layer, the shoulder section shear layers extending from the sidewall towards the crown;
• a pair of bead section shear layers, one of the pair located at each sidewall respectively and each positioned on at least one axial side of the carcass layer, the bead section shear layers extending from the sidewall towards the bead core;
• wherein one or more of the pairs of shoulder section and bead section shear layers are constituted of a short-fiber reinforced elastomer composition having a modulus of elongation measured at 10% (MA10) of between 25 MPa and 100 MPA, and
• wherein the shoulder section shear layers and the bead section shear layers in a pinch shocked region of the tire are opposite to one another across an interior of the tire.