An apparatus for testing a tire is disclosed. The apparatus includes an improved test probe. The apparatus comprising a support frame, first and second rollers connected to the support frame and arranged to support to support a crown portion of the tire, a probe having a support bracket for receiving a section of chains. The section of chains is comprised of a plurality of first chain members, wherein the first chain members extend in a first direction. Preferably, the first chain members are oriented in parallel relation with respect to each other. The first direction is preferably in the vertical direction. The section of chains further includes at least one cross chain member which contacts or interlinks or joins with each first chain member. The section of chains may also comprise chainmail. The section of chains or chainmail is positioned in the tire and is in electrical communication with a first electrode, wherein one of said rollers is a second electrode, and a power supply in electrical communication with the first and second electrode in order to created a electric potential between the first and second electrode.