• Tire wheel assembly is out of balance

• No hub centric rings on aftermarket wheels so buy hub centric rings

• Incorrect mounting hardware for after market wheels

• Tire is poorly seated on the rim

• Irregular tire wear

• Out of round rim / Out of round tire

Do not ignore apparent impacts, pulling or vibration. This could be an indicator of tire damage as much as mechanical problems that should be inspected by a professional. If there is a problem with your tires and the way they have been installed they will most likely begin to shake and vibrate your vehicle at between 50 and 65 mph.