Patent ID: 7762009

Claim:
An article of footwear comprising: an outsole including a circular tread pattern disposed on a forefoot portion; the circular tread pattern including a first circular tread having a first radius, the first radius being the smallest radius of any circular tread; the first circular tread extending less than 360 degrees in a circumferential direction around a center of the circular tread pattern; the first circular tread comprising a plurality of tread elements disposed in a first circular groove; the tread elements having a generally elongated shape with a radial width and a circumferential thickness, wherein the radial width is greater than the circumferential thickness; the circular tread pattern also including a second circular tread having a second radius greater than the first radius; and wherein the second circular tread also extends less than 360 degrees in a circumferential direction around a center of the circular tread pattern.