I have been shopping around Challenger Scat Packs and I was puzzled to see a 480hp car with 245s...I recall some facts about why the Challengers (and Chargers) ended up with narrow wheel wells but the facts are escaping me. Is this considered a major handicap for these cars? How big can you go in the aftermarket? IIRC, the Hellcats come with 275s at least, right? My relatively wimpy Mustang can easily accommodate 315s in the rear and 305s in the front (wth carefully selected offsets)...doesn't seem fair! FWIW, I run 285s on mine currently and still wish for more.