The picture I posted of the Sapphire Black 325cic in your other thread has the sport package -- you can see the ZSP wheels and I remember it had the sport seats. If 17" wheels are available as a separate option, they are probably the same as the package wheels, but I'd have to check the brochure.
Edit -- I only have a 2005 brochure for the sedans and it appears there isn't a stand alone 17" wheel option for the 325i. Maybe that's different for the convertibles.