Balancing
Proper tyre mounting includes balancing. Due to centrifugal force, a tyre imbalance of 10 g results in an effect of 2.5 kg at a speed of 100 km/h. Firstly, an imbalance in the wheels, especially front, will be felt as a vibration through the steering at higher speeds.
· Static balancing: For static balancing the tyres are mounted on a balancing machine and the tyre is rotated. If a wheel with static imbalance is mounted on a spindle with the heavy spot at the top, the heavy spot would rotate to the lowest possible position on its own. If the wheel is in balance it will not have the tendency to rotate by itself. With this type of balancing unequal mass distribution of tyre and rim can be determined. Static imbalance means that the wheel has got a heavy spot. Dynamic imbalance occurs when there are two heavy spots on the inside and the outside of the wheel. These imbalances are individually offset by placing counter weights on the wheel.
· Electronic Balancing on the car: After being mounted on a car, a smooth running wheel may show new imbalance even if it had statically been balanced before. This occurs since static and dynamic balancing is executed at the wheel only. Electronic balancing considers wheel and wheel receiver as one unit. Production tolerances of the wheel hub, remaining imbalances of the hub and non-uniformity in brake drum or brake disc are included in the balancing process.
