I've been having a grinding noise that comes from the front of my car, and occurs at every tire rotation, meaning it only makes the noise when the wheels go round.. I just put on some new rims, and since then it's gotten really loud. The car vibrates at higher speeds. The noise goes away when I turn sharply in either direction, and when I brake. Anybody know what the problem is? I'm taking it into my mechanic tonight, but you know mechanics... they sometimes like to tell you it's something else much more expensive..