Patent ID: 7934327

Claim:
A torsion system for a cycling shoe including a sole with a forefoot area and a rearfoot area, the torsion system including a longitudinal axis and comprising: a forefoot portion of the torsion system spanning the forefoot area of the sole, the forefoot portion having a generally smooth concave contour along the longitudinal axis; a rearfoot portion of the torsion system spanning the rearfoot area of the sole; and an intermediate portion of the torsion system coupling the forefoot portion and the rearfoot portion, and constructed of a material and configured to allow, in a pre-selected manner, rotation of the forefoot portion relative to the rearfoot portion about the longitudinal axis, wherein the intermediate portion includes a rib that projects beyond an adjacent surface of the torsion system, wherein the rib tunes torsionability of the cycling shoe.