noob coil over offset question (sorry guys)

[Fresco]

So I have a 17x7 +38 rims, I want to run 215/45 17 tires on the P5, will I still rub on bc coils with camber plates, or should I just run 205/45 17 tires, I used that offset calculator website and it mentioned that it would fill the wheel well "by extra 12mm" I honestly have no idea what that means lol so input please guys

 

[Jackie chan]

Youre wheels are an inch wider and are pushed out 12mm more than stock. This means that the total amount that your wheels stick out past stock is 1/2"+12mm.
If youre fenders ar rolled, you should be good.
If not, then a little camber or height may need to be adjusted.