I have an 04 325cic with prem. and sport packages and my ride really diminishes at higher speeds with a little vibration and a really bumpy ride. I've had this car for a few months after I traded in my 03 325i sedan. The 325i came stock with 16s which I replaced with chrome 17's and low profile Cont touring tires. The ride was remarkable, especially at higher speeds. I got the rims and tires from thewheelexchange and I heard that it has something to do with a higher profile wheel and mount. I do not want to change these rims but I want that same ride I had with the sedan when I was going at higher speeds. So does anyone know anything of a higher profile wheel and mount and where can I go to get this done?