OK, i bought a '90 535 about 2 weeks ago all stock (wheels ,suspension) no shimmy at 50mph ,bushings are ok.I bought ac achnitzer wheels 17" ,replaced shocks,springs and i expected to get shimmy at 50-55mph which i did.I finally took a car today to balance the wheels to get rid of vibration.Paid 60$--still shimmy.WHY???I went back to the same place they balanced them all 2nd time---still shimmy.I came back home rotated schnitzers ---still shimmy.When i put the stock tires in the front ---NO shimmy---.What is the problem????Can anyone help me out??? I know it is obviosly something has to do with the wheels , but what can it be??? Thank you Michael '90 535 5 speed(shimmy)