Static Wheel Balance

"Static" balance is the equal distribution of weight around the wheel and tire assembly. If the unbalance of a wheel lies in the plane of wheel rotation, it is known as static (or kinetic) unbalance. This condition causes the wheels to bounce. The wheel lifts off the road, then slams down during each revolution. This will result in flat spots on the tire tread and worn ball joints, tie rod ends, steering gears, and shock absorbers. Bouncing could also set up a heavy vibration in the chassis and affect the steering balance.