I measured the distance between the outside surface of the SSB caliper to the face of the rotor and came up with 5/16" (0.3125 inches) which is what ERA shows on their site for a GM caliper. ERA shows the Wildwood caliper to be 0.417 inches beyond the face of the rotor which requires a 3.88 inch wheel backspace. Trigo told me their front wheel backspace is 3.650 inches. Difference: 0.417 + 0.3125 = 0.7295 inches further back from rotor face. Does this mean the Trigo wheel with 3.650 inch backspace will fit without further machining?
