The 19s on Ferrari, Porsche, etc. have larger sidewalls than the 19s on BMWs because the overall diameter of the tire is larger. The issue is aspect ratio not the diameter of the rims.
Originally Posted by Yeoman
Tell that to Porsche, Lambo, Ferrari, etc.. Good luck finding a wheel smaller than 19" on those..
Drivers Club at Lime Rock
The Glen Club
International Motor Racing Research Center
Cayman Club Nor'Easters
Madison Ave. Sports Car Driving and Chowder Society (Only a Vice President)
Sports Car Club of America
Polish Racing Drivers of America (PRDA)
American Mural Project