I went from the the stock 18's (38mm offset) in 245/60/18 to Borbet 18's (-2mm offset) in 265/60/18, which I believe means I've moved the outside of my tires 50mm (40mm for rims + half of the extra 20mm of tire width). I had to trim the front cladding on both sides and a very small square off the rear section of the front wheel well (driver's side only - weird). Neither are noticeable whatsoever.

Hard to say whether you'd rub with lower profile tires on wider offset rims without heavy slide rule usage. However I think it's reasonable to assume that if you have to do any trimming it won't be substantial.

Go for it!