Hi just made my self a member this is my first time on one of these sites and need some help badly,ive got a 2006 b7 a4 3.0tdi avant, quattro, ive just brought some fat fives alloys which i believe came of a a6 they are 18 inch,8.5j,et45,and came with 255/45/18 tyres,ive tryed to put them on my car and the rears will fit,but the front ones are catching the suspension,so i am going to have to put spacers on does any body no what size i need,thanks for help