oops, brain fade on my part... for the hub to hub measurements the (+ve) offsets should be added to the track, not subtracted...sorry about that. series 1 front (1421+90) 1511mm and rear (1458+90) 1548mm series 2 front (1461+48) 1509mm, and rear (1494+48) 1542mm so I make the difference at the front -2mm, at the rear is -6mm... dave '95 rs2 '90 ur-q