the invention relates to a polymeric product having domains of injected ingredients therein . a tire having precisely placed and oriented injected ingredients is described . the nature of the injected components , and their density , as well as their placement and orientation , are determined based on tire property enhancements desired . fibers may be injected into the tread shoulder area of an uncured tire to provide abrasion resistance and traction in the cured tire . high tack rubbers or adhesives may be injected into the central tread region of a cured tire to enhance traction and grip .