I'll post some more until I can show a picture of my car. My rims are 14" so that alone means it isn't a large surface area, but....the design I chose may possibly be one which causes poor aero because of the sharp edges. I have Sport Edition D5 14" alloy wheels. The wheels are about 13.2-13.4 LBS using an electronic bathroom scale. The wheels are low pressure cast and shot peened and made by Kosei.
I'm already paranoid that my rolling resistance has dropped since installing the new rims with my wider tires. I have to do a bunch of testing to figure out exactly what the score is. Last year I replaced my 175/65R 14 snow tires with General Evertrek 195/60R 14's and just put them straight onto my stock steel wheels and I swear with similar PSI I didn't notice a change in MPG. This time the rims are lighter, but not as smooth and also 1/2" wider. I think the track is different too, as the offset is different by 7 mm.
thanks for the feedback folks...I guess I'll do some research and start some testing...
