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.
â Vibration A vibration can be caused by chipped or damaged gears inside the transmission. However, don't jump the gun hear because vibrations are most often caused by a bad U-joint (if your vehicle is rear wheel drive) or a badly worn CV axle if you have a front wheel drive vehicle.