B - Balance
Balance - An unbalanced wheel will cause vibration through the steering and wear tyres out quickly. All good tyre-fitters will balance wheels when fitting new tyres.
'Balance' is also used to describe how a car feels. A balanced car is one that feels in harmony with its driver, whose front and rear wheels grip in an even manner. It also concerns the feel from the car's steering and the sensitivity of its controls, such as throttle and brakes.