Can having 2 different size tires cause the car to shake?

Yes, having two different size tires on a car can cause the car to shake. This is because the different tire sizes can cause the wheels to rotate at different speeds, which can cause the car to become unbalanced. The shaking may be felt in the steering wheel, the seat, or the floorboard. In addition to feeling shaking, a car with two different size tires may also experience vibration, a change in ride quality, and reduced fuel efficiency. It is important to ensure that all four tires are the same size to avoid these problems.