Golf club head with flexure

A golf club head, comprising:

• a crown defining an upper surface of the golf club head;
• a sole defining a lower surface of the golf club head, comprising a transmittal portion, a flexure and a rear portion, wherein the flexure is defined by a front wall that is spaced from a rear wall to define a cavity, wherein each of the front wall and the rear wall extend from the sole toward an interior of the golf club head;
• a side wall extending between the crown and the sole;
• a hosel extending from the crown and including a shaft bore;
• a face defining a front ball-striking surface and a back surface, the face intersecting the transmittal portion at a leading edge;
• and
• a filler at least partially filling the cavity defined between the front wall and the rear wall of the flexure,
• wherein the golf club head defines an origin at a location on a shaft axis defined by the shaft bore in a plane defined by the proximal end of the hosel, an x-axis extending from the origin in a heel to toe direction and parallel to a plane that is tangent to the face at a geometric face center of the ball-striking surface, a y-axis extending vertically through the origin and perpendicular to a ground plane when the golf club head is in an address position on the ground plane, and a z-axis extending in a face to aft direction parallel to the ground plane when the golf club head is in an address position,
• wherein the flexure is spaced aftward of the ball-striking surface by the transmittal portion, and comprises a front wall, wherein the front wall extends into a cavity defined by the golf club head,
• wherein the front wall and the rear wall form divergent flanges that are angled away from each other as they extend further toward the interior from the sole so that the fore/aft distance between the members increases from the lowest portion, when the golf club head is in the address position, to the most inward, upper ends.