That will happen when you go to such an extreme wheel size. the problem will occur based on a couple of factors. What is the offset of your rear rims and how wide are they? What size tires did you put on the rims. When wheel offset. OD and tire size are not calculated correctly your tires will rub.
Not to mention that depending on what wheel size you choose, there is no correct calculation because they are simply too big.
Below is an essential tool when purchasing custom wheels:
Tire Size Calculator - tire & wheel plus sizing
You enter in your OEM size and the size you want to use and it calculates the difference and givs feed back.
This all comes too late now as you have your rims and I am sure you want to keep them so it may be something that you will just have to deal with. Depending on your Offset (Over or under), you may be able to reface (Cut down) them or use spacers. ???