CAR SHIMMEY on 2000 BMW 323Ci

I PURCHASED A 2000 BMW WITH 44,000 MILES IN EXCELLENT CONDITION. NEW BRAKES WERE PUT ON BEFORE I REC'D IT. THE CAR HAS A "SHIMMEY" WHEN I HIT 45 MPH, AND THEN AFTER THAT SPEED, IT GOES AWAY. ANY IDEA WHAT THE PROBLEM COULD BE? NEW RIMS WERE PUT ON IT ALSO, LAST YEAR. I WAS THINKING A WHEEL BALANCE ISSUE? YOUR THOUGHTS.

by in Lancaster, NY on September 14, 2010
2 answers
ANSWER by on September 14, 2010
If the shimmy is only experienced as you are driving (not braking) it is likely to be wheel balance issue or a worn suspension bushing or the likes. Start first if you like yourself rotating the wheels front to like and see if the condition changes or just have the best tires balanced and put on the front. If you have the front tires jacked up spin the wheels by hand and see that the wheels spin true and don't wobble.
ANSWER by on September 27, 2010
You CAN'T jack up the car and spin 'em to see if they're out of balance. That's what a spin balance machine is for. check lower control arm and ball joints as well as having your tires balanced.