Track is the width at the tire centerlines (see definition). Rear track is the same for B110 and B210 at 1245 mm.
Track: center of tread-to-center of tread
Front Track B10 : 1190 mm B110: 1240 mm (49.0 inches) B120: 1240 mm B210: 1245 mm for 13" wheel models B310: 1305 mm for 12" wheel models B310: 1330 mm for 13" wheel models * A10 style Ball Joints widen the track
Rear Track B10 : 1180 mm B110: 1245 mm rear B120: B210: xxxx for 13" wheel models B310: 1300 mm Rear for North American models