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.
2. Vibrations from the brakes. Another symptom of bad brake rotors is excessive vibration coming from the brakes. Warped or excessively worn rotors may vibrate irregularly and cause vibrations that can be felt in the pedal, and sometimes through the vehicleâs chassis. Warped rotors may also produce a pulsating feel that will be felt in the pedal when the brakes are applied.