Yay! I had this problem forever. Just bought a new set of BF's G-Force adn had them put on. Good as new. I never thought my car would stop shaking. Had the tires balanced and rotated many times and they still vibrated. Guess it was the tires. Too bad it threw my alignment off huh? Only prob is I still need an alignment. No one here can do it. They said my tires/rims are too wide and they dont want to scratch the chrome off. They said there is a new machine that is ment for this purpose but no one here has it. WTF is up with that? Ideas?

 

Why don't you put narrower rims/tires for the alignment, and once the car is aligned like it's supposed to be, then put back your new tires/rims.

 

Dont have em anymore. Stupid me. I'm in the process of getting a spare set of the factory alum rims. With the alignment, they set it up so everything is done around those rims you have on. I'm going to the porsche dealer to have them do it. They will do it for me.