1995 BMW 325 BMW grinding and vibrations at 50+ on right tu

Thank you for your donation and for your description of the problem. The problem is most likely a wheel bearing noise, the left one is the possible culprit. Lift the left wheel off the ground and give it a spin, any rumble heard or felt will confirm the diagnosis. They are not difficult to install, they require a puller for the bearing race, they often get stuck. Here is a link to the part: http://www.realoem.com/bmw/showparts.do?model=CB43&mospid=47498&btnr=31_0424&hg=31&fg=10