Just highway speed vibes, not at lower speeds, 9 times out of 10 is tire balance. Have all tires inspected, if good....balanced....and the best of the four put on the front. The tires that go to the rear in this case must have descent tread depth or it can cause a very dangerous scenario when driving in water. It also is highly recommended too that you have your front end checked as well to be certain you don't have other issues or a combined problem. If your two front tires are worn more than the front, more than likely the tires weren't rotated often enough. Rotate your tires every 6,000mi. Every other oil change for most folks. This saves time and money. If the two front tires are worn and the back look pretty good, they might recommend an alignment and say that is what caused it. Partially true, but remember they are in it to make money. Have your alignment checked once a year, just after the snow is gone, and rotate every 6,000 and tires magically take care of themself!
Wheel balance
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.
One or more tire out of balance, a bent wheel, or defect in a tire.
Wheel balance, Worn steering parts, Worn suspension parts, Tire damage,
a shake in the steering wheel could be a few things,a bad rim,broking belt in one of front tires,aliment,ball joints,or could be all of these thing Could be as simple as wheel balance but have the front end checked by a mechanic to be safe.
have your front tires rebalanced.
More than likely you have a tire out of balance. It is possible you have a bent wheel. Have your tires balanced, inspected, and rotated.
Probably i would go for wheel balance and maybe check your wheel bearings rotors will not make it shake because of speed
Tire out of balance, tire defect, bent wheel, defective wheel bearing, loose lug nuts, or worn suspension or steering parts.
Tire out of balance, bent wheel, loose or worn suspension parts. More than likely balancing & rotating your tires will correct this.
Probably wheel balance but you should have the front end safety checked for your own safety. You may have a tie rod end ready to separate and you would lose your steering, not good.