A method for determining a depth of a cable embedded in a sidewall of a tire, the method comprising: inserting a cable depth gauge into a repair hole formed through a tire, the cable depth gauge comprising: an elongated body having a proximal end having an indicator point set to reference a surface of the tire, the elongated body having a width sized to determine eligibility if the repair hole being examined meets a minimum size for a repair process, and a first measuring region and a second measuring region located at the proximal end of the elongated body, each of the first measuring region and the second measuring region being arranged at a known distance from the indicator point, the first measuring region extending from the indicator point to the edge of the second measuring region, and the second measuring region extending beyond the length of the first measuring region; positioning the indicator point of the cable depth gauge at a surface of the tire; determining whether the cable falls within the first measuring region, the second measuring region or beyond the second measuring region; and classifying the depth of the cable as shallow if the cable falls within the first measuring region, medium if the cable falls within the second measuring region or deep if the cable falls beyond the second measuring region. inserting a cable depth gauge into a repair hole formed through a tire, the cable depth gauge comprising: an elongated body having a proximal end having an indicator point set to reference a surface of the tire, the elongated body having a width sized to determine eligibility if the repair hole being examined meets a minimum size for a repair process, and a first measuring region and a second measuring region located at the proximal end of the elongated body, each of the first measuring region and the second measuring region being arranged at a known distance from the indicator point, the first measuring region extending from the indicator point to the edge of the second measuring region, and the second measuring region extending beyond the length of the first measuring region; an elongated body having a proximal end having an indicator point set to reference a surface of the tire, the elongated body having a width sized to determine eligibility if the repair hole being examined meets a minimum size for a repair process, and a first measuring region and a second measuring region located at the proximal end of the elongated body, each of the first measuring region and the second measuring region being arranged at a known distance from the indicator point, the first measuring region extending from the indicator point to the edge of the second measuring region, and the second measuring region extending beyond the length of the first measuring region; positioning the indicator point of the cable depth gauge at a surface of the tire; determining whether the cable falls within the first measuring region, the second measuring region or beyond the second measuring region; and classifying the depth of the cable as shallow if the cable falls within the first measuring region, medium if the cable falls within the second measuring region or deep if the cable falls beyond the second measuring region.