Besides bent rims and or bad tires what else can cause serious car shaking at high speeds?

- Driveline issues: Problems with the driveshaft, U-joints, or transmission can also cause the car to shake.

- Suspension problems: Worn or damaged suspension components, such as shocks, struts, or control arms, can cause the car to shake.

- Engine issues: Engine misfires or other engine problems can also cause the car to shake.

- Aerodynamic issues: If the car's body is not properly streamlined, it can cause the car to shake at high speeds due to air turbulence.