checked the front end for bearing failure no play at all?fromt end starts shaking at fifteen miles per hour and rotated tires no help either
front end shaking on 1990 BMW 325i
Make sure your front wheels aren't bent and the tires are round first! Next, Check your front control arm bushings for cracks. If they look ok - check the ball joint in lower control arms. If your still not sure you can get it inspected for free at The Black Forest in Auburn
You need to get the entire front end check, including all suspension and steering parts.
I have had sim problems on two dif cars. Both cars resulted in new tires fixed the problem.