Method of customizing a sole structure of an article of footwear

A method of customizing a sole structure of an article of footwear, the method comprising:

• adjusting the flexibility of a sole component of the sole structure, the sole component having an inner surface and an opposite-facing outer surface;
• wherein the sole component includes a plurality of inner recesses extending from the inner surface and a plurality of outer recesses extending from the outer surface, the plurality of inner recesses including a blind-hole inner recess, the plurality of outer recesses including a blind-hole outer recess, and wherein the blind-hole inner recess is generally aligned with the blind hole outer recess along a vertical direction;
• and
• wherein adjusting the flexibility of the sole component includes selectively cutting or removing material from one or both of the blind-hole inner recess and the blind-hole outer recess.