Will they rub to much or not.........

Okay I am getting the AROSPEED RSGT's rims in 18's. Now here is the messed up part. They don't make them in 17's because of our lug pattern and I guess the offset is different as well. The tires that I'm getting are Bridgestone Potenzas RE730's. Heres the problem, they don't come in 215/40/18 they are only in 225/40/18. My question to you guys is will the tires rub on my fender well. I have a 1.8 in drop in the front and rear. Of course you all with SpecV's know that our stock tires are 215/45/17. I'm hoping because I don't have that much of a drop and that the tires will be 40 series that they won't rub. But please be as honest with me as possible because I don't want to mess anything up. Thanks