18'' Wheels on your A? What size tires are you running? Post Pics!

You're talking a 1.6mm difference between 5x100mm and 5x4inch. Not that big of a deal at first glance, BUT my brother in law had some wheels on his G6 that weren't the exact bolt pattern for his car ( not sure what the mm difference was but i'm thinking it was like 5mm ) . He had about 1 broken wheel stud every 6 weeks. .7mm is probably an acceptable variance.
This is one of those things, some will be ok with it, others just wont...kinda like 18's on an a-body ;) I kinda like the big shoe, pro touring look myself