[bucknmusky]

I currently drive a 2002 chevrolet cavalier with the stock 14" steel rims and plastic 5 spole wheel covers. I was looking into getting the moon disc hubcaps to cut down on drag. I have access to a set of 15" factory steel wheels, from another cavalier and so was wondering if the larger rims (with the 15" moon disc hubcaps) would do more good becasue the tires are the same overall diameter so more of the outer area of the tire/wheel combo is actually covered by smooth metal and there would be less deflection because of smaller sidewalls, or would larger rims add additinal rotating mass where is should not be and negate any areodynamic advantage. Too expensive for A-B-A testing for me so I will take opinions as a good second opinion. thanks y'all