He's right but if the wheel is just barely hitting your caliper you can get a 5x100 wheel spacer. If you just need a couple millimeters of clearance to fit the rim a thin spacer will work without changing the studs. I don't recommend getting anything wider then 1 inch or your tires will stick out then you will need to go widebody. I use a 5mil spacer works great studs did not have to be replaced.
If you haven't bought rims and are planning to buy new rims get rims with the correct offset or go custom on the offset so they have clearance between the caliper and the rim.