your tires might not be balance, or the tires belt is broke.. and might want to have or you can check your tie rod for to much movement. All you have to do is jack your front wheels up and pull up an down on it while your tires off the ground. Its souldnt have no movement and also can check ball joints the same way but by pulling left to right.
It would be highly unlikely.
i would really like to know myself
If it happens when you are driving fast (60-70 MPH) it could be that your wheels are out of alignment.
Can be a bent wheel, tire out of balance, or worn suspension parts.
The symptom would indicate a wheel/tire/balance problem. You need to have a professional inspect if you are driving at those speeds. also make sure if you drive at 120+ mph, you have "Z" rated tires for safety.
Not likely. Normally this is caused by a tire out of balance or a bent wheel.
I would check your tires they could be out of balance. or a tire could be bad .
Check the wheel balance
Most of the time this is caused by a tire out of balance or a bent wheel. Take your car to anyplace that sells tires and have the tires rotated and balanced.
its not spossed too...you may need to balance your tires
balance tires
I would say 110 mph but that is only an estimate.