18 to 19

I have the 2013 Gen 3.8L sedan with premium package and therefore the 18" stock wheels (18 x 7.5 w/ 39mm offset) and tires. I really like the look of the stock 19" wheels (19 x 8 w/ 39mm offset) on the R-spec sedans. I am interested in upgrading to those wheels around the time the factory...