hi there ive purchased some bbs ch replicas 19inch for my pre facelift a3 3door. they fit on but i have been advised to get spigot rings as there isnt enough room for the alloys to sit on, ive been asked to measure the gap in the middle of the alloy (where the centre cap goes) but i dont have time as i am currently doing 12 hours each day at work... can anyone help me ??? not sure if its 57.1 or 66 or whatever,, but before i buy i need to know the measurement size. Much appreciated thanks