A British thermal unit (Btu) is a standard unit of energy that is used in the United States and sometimes in the U.K.
There is another defect in tires that can cause a vibration called loaded road force variance. The tires and pass a visual inspection, a radial and lateral runout test, be perfectly balanced, but still cause a vibration. This is due to the internal defects in the tire.
It has been popularly believed that the car vibration is caused by the wheel alignment. Mostly, the vibration in car is caused by the damaged or unbalanced wheels or tires. In addition, the damage on the suspension, drivetrain, and steering components can also cause the annoying vibrations. However, there are some other causes of car vibrations. You can see in the following account.