Where is this measurement taken from? Going by what you show the RS's track is only 20mm larger front and 27mm increase in the rear. I believe in many publications that Ford states...feel free to correct me if its wrong...that the Focus RS has a increased track width of 65mm over stock! As I asked in the beginning were are you figures measured at?
The measurement of 1514mm is taken from the center<->center of rim/tire.Here as stated by http://www.fordwiki.co.uk/index.php?...Specifications
Front Redesigned MacPherson strut suspension with uprated offset coil springs/Sachs racing dampers, 65mm increased track width, revised lower A-arms incorporating a unique all new hydro bush, revised static negative camber, 18 mm anti-roll bar