You probably won't notice a difference but it will theoretically make a difference. the factor is greater the further out from the rotational axis you go so 1lb lighter tires would make a bigger difference than 1lb lighter rims. Most of us are making lots of small changes which all add up to big savings.
If you are paying for it, it probably won't pay you back though. Not that that has stopped me.
http://forums.bimmerforums.com/forum...p/t-79243.html
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Vortex generators are old tech. My new and improved vortex alternators are unstoppable.
"It’s easy to explain how rockets work but explaining the aerodynamics of a wing takes a rocket scientist.
