Guys im looking to get a 15x8 inch rim so i can put a 27 or 28 inch tire on it. What back spacing and offset are ideal for the 2011-2014 mustangs? I want to just be able to swap the rear rims and hit the track. Also what type of tire do you recommend? Slick or radial? My mustang is an Auto and i plan on having 373 gears installed very soon. Ive looked at what size most guys recommend and its 28 inch but thats because they are a manual trans. They also recommend a slick for manual trans.