1. (Units) a unit of heat in the fps system equal to the quantity of heat required to raise the temperature of 1 pound of water by 1Â°F. 1 British thermal unit is equivalent to 1055.06 joules or 251.997 calories.
Quick Answer. A major factor that usually causes tire noise is the air chamber inside the tire. The large void that is filled with air acts as a giant resonance chamber. Thus, the tires are something like donut-shaped drums that generate a low-frequency hum when tires are rolling.
If your car shakes while driving down the road or the steering wheel vibrates, you're not alone. One of the most common complaints of vehicle owners is vibrations. Whether it from the car tires, bent rim, or the brakes, they can be annoying and if left unattended for a long time, it could cause premature wear and tear on the tires and suspension.