A footwear article is formed by providing at least one spent automobile tire having a tread, separating a portion of the tread of the tire, trimming the separated portion into the general shape of a foot and securing the separated portion to a top sole portion. The bottom sole portion of the footwear article has a generally, non-uniform thickness and irregular pattern. The bottom sole portion can fixer have elements of a scrub pattern indicator element, a tie bar indicator and/or a ply fragment visible on an outer edge thereof.