Well, some bad news, I didn't pick them up Monday as planned because I forgot I had an appointment before class. Anyway, called Hubcap Mike up today with some technical questions and to check stock before I headed out to pick them up. So the "pop-on" style (hubcaps) only work on steelies, I had figured as much but thought I would be able to come up with some clever way to mount them. So the wheel covers (screw-in) are made to order by Mooneyes, and take about 5 business days to complete so there goes my plan to test out simple aero mods on my upcoming trip.
As far as weight is concerned they are listed at 1 lb. each, easy enough to compensate for that addition of weight.
Mounting the screw-in type requires dismounting the tires and drilling into your rims...