If the vibration is in your steering wheel..most likely wheel alignment or balance, incorrect tire pressure..AND quite common that a NEW set of tires are true and round but your front tires are out of round and are fighting each other...should always replace a full set..

If the vibration is under your seat and not on the whell, then yes this is a sign of something else..

at hikgher speeds, does the car track straight....or do you have to contol the steering wheel more from one side?

Best tire pressure is 34 front 36 rear...if the new tires where placed on by tire store, they may have over inflated them...can cause this as well..

__________________
If you want to just look at it, buy a poster, otherwise drive like they were built to be driven!

1-866-LAMBORGHINI

www.catsexotics.com