1999 BMW 323i: 95,000 miles. Car shakes on highway. Dealer says can't balance wheels because 3 out of 4 rims are bent, they don't look bent. (BMW replaced both control arms last year). I then brought it to my local Goodyear shop. They balanced the wheels. Car still shakes. Called Goodyear shop, they said all wheels were perfectly balanced with very sensitive balancing equipment. Then, I went to Goodyear with my car, they said they would recheck the wheels by increasing the balancing speed to 120 mph. They called me back and said one wheel is only 1 gram off and I need new tires because mine are "lumpy". I've had these Bridgestone tires on since 50,000 miles and the treads are not worn yet. What do I do?

If your tires were unbalanced, then your tires are going to need to be replaced. Just re-balancing them wont do. The lumpiness (caused by the car being unbalanced) will only cause it to come unbalanced again.Also have your alignment checked and realligned if necessary.

I'd go with what goodyear said, belive it or not places like goodyear and tirestone are the best to go for wheel related issues, since it's their primary job. It is possible your tires are the fault, maybe they wore wrong due to an alignment issue, or the belts are slipping.Maybe ask them if they'll refund your money if you buy 4 tires from them, and it doesnt solve the problem.

Tires that have impacted a curb or a pothole and have developed a tread separation (out of round tire), can still be balanced perfectly as stated, but are out of round and will vibrate the car more and more the faster you go. It's a simple answer to your problem. If you had a complete set of wheels off a car that didn't vibrate, the odds are great that your car wouldn't vibrate either with the good wheels you swapped onto the car. So first take the rims to a wheel shop and have them tested good. Then bite the bullet and put a new set of tires on the car. Alternately, buy a whole new set of tires and rims from http://www.tirerack.com My personal recommendation is to buy Michelin tires.

If the car is a convertible then there are certain speeds where they will naturally shimmy (mazda miata 65mph, vw cabrio 80mph etc.) if the shake is worse when on the gas and scarcly present at part throttle then check your motor, transmission, and rear diff mounts. Also aerodymamics will heavily influence a car with any damaged body panels. Argh...this is like a doc diagnosing a patient by mail...we need more specifics.

if rims r bent they r bent. what u can do is take it back to the tire ,and ask them to put one on the balance mach. ,and let u see for yourself how bent it is

It could be your alignment. Does your car pull at all to one side?

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this is right

there are several differand things it could be. first have them check out your stableizer bars. if its not that your rack and pinion may be the cause of all your shakin