Most of the factory race cars used simple stamped steel round (Lucus ?) rims http://www.racingsportscars.com/photo/1961/Sebring-1961-03-25-042.jpg http://www.racingsportscars.com/photo/1962/Sebring-1962-03-24-043.jpg Lighter... I guess. The mis-match probably doesn't appeal to most! Steve