I guess one learns something new every day
Using the correct Offset/ET I put the new numbers into the Tire Track tables and if I purchase these REPRO M3 Wheels using them for winter tires same on all wheels as 255/40/R18 then the bottom line would be;
A) 11 mm (0.43") more clearance on the strut side
B) the wheel will retract on the outside edge by 11 mm (0.43")
C) Original Diameter was 25.02" New Diameter will be 26.03"
D) Difference in Diameter will be 1.008 0r 3.872% larger for the winter tires
E) Speedo @ 60 mph will now read 62 mph with the new wheel / tire set up
I checked the average price for repro M3 wheels are $225- plus 13% tax in Canada, so for 4 wheels this would be $1,017.00 I can pick up the 4 wheels for $575.00 Canadian a saving of $442.00 I think that is a fair deal for the 4 new wheels (see the pictures in my post above)
Thanks again for taking the time to help me out with this.
[A wheels offset is determined by the distance from the centre of the wheel to the rear of the bolting plate For any individual alloy or steel wheel, ET and Offset both have the same meaning and value. The term ET originates from the German word 'Einpresstiefe' which translates as 'insertion depth'.]