Another wheel topic

[chow]

Before I get flamed I need to ask one question..

( I have searched the forum and could not find a clear answer)

What is the maximum offset our cars ( A/C 3.5 or 2.5 ) can have?I don't understand how you calculate what can and cannot work. If there is a calculation please throw it my way and ill figure it out if not.. Ill need advice.

So i understand that our cars run with +45mm offsets. I'm planning to purchase 18x 8 rims with I dont know what tires ( The dealer is deciding what will fit on them) that are +37 offset. Will +37 fit on a lowered A/C? or should i fit it with +45 and remain with the stock configuration?

Thanks alot guys.

BTW 18x 8 Tenzo type m's with Falken FK 452.