Abstract: In April of 2008 a tire examination case was presented to the author in which the documented impression evidence showed evidence of extreme tire wear in the crime scene impressions. The suspect vehicle, which was recovered shortly after the crime, also exhibited corresponding wear on the tires in the same mounted positions. The degree of wear was such that the author was able to establish a greater degree of association between the impressions and the set of tires from the vehicle than he could otherwise expect from a single tire alone. The term “extreme tire wear” is introduced. The author also discusses the need to draw conclusions regarding the set of tires, as opposed to individual examinations, when the possibility presents itself.