Will bad tires make car shake at certain speeds?

Yes, bad tires can cause a car to shake at certain speeds. This is most commonly caused by uneven tire wear, such as cupping or feathering. Cupping is when the tire tread wears unevenly, creating a series of small dips in the tire. Feathering is when the tire tread wears unevenly, creating a series of small ridges in the tire. Both of these conditions can cause the tire to vibrate at certain speeds, which can be felt in the steering wheel, seat, or floorboard.

Other causes of vibration at certain speeds include:

* Worn or damaged shock absorbers or struts: This can cause the tire to bounce excessively, leading to vibration.

* Bent or damaged rim: This can cause the tire to wobble, leading to vibration.

* Loose wheel lug nuts: This can cause the tire to come loose from the wheel, leading to vibration.

If you experience vibration at certain speeds, it is important to have your car inspected by a qualified mechanic as soon as possible. This will help you to identify the cause of the vibration and get it fixed before it causes further damage to your car.