Does the number 8 on the tire (as it is called) need four-wheel alignment?

Four-wheel alignment is adjusted according to the four-wheel parameters of the vehicle to ensure good driving performance and certain reliability of the vehicle. The steering wheel, steering knuckle and front axle of an automobile have a certain relative position, which is called steering wheel positioning, also known as front wheel positioning. Front wheel alignment includes four contents: caster angle, caster angle, camber angle and toe-in of front wheel. This is for the two steering front wheels, and there is a relative position between the two rear wheels and the rear axle, which is called rear wheel positioning. Rear wheel alignment includes camber angle and toe-in one by one. Generally speaking, front wheel alignment and rear wheel alignment are called four-wheel alignment.

The role of one-wheel positioning and four-wheel positioning

Front wheel alignment includes caster angle, caster angle, camber angle and toe-in. Rear wheel alignment includes camber and toe-in one by one. Such front wheel positioning and rear wheel positioning are generally called wheel positioning, which is often called four-wheel positioning. The function of wheel alignment is to keep the car running smoothly in a straight line and steering lightly, and reduce the wear of tires and steering parts when the car is running.

Second, under what circumstances should we do four-wheel positioning?

1, the driving performance of the vehicle is affected (the driver feels the most direct deviation, and the direction does not automatically turn back).

2. Damage to the chassis and suspension caused by the accident.

3. Abnormal tire wear (but also consider whether abnormal tire pressure leads to abnormal wear. In general, too high tire pressure will aggravate the wear of the tread center, and too low tire pressure will aggravate the wear on both sides of the tread; If there is eccentric wear on one side, it may be a deviation of camber angle. )

4. Some axles and suspensions have been removed.

Third and fourth wheel positioning data to be adjusted:

1, caster angle: function: linear stability, steering righting.

2. The kingpin inclines inward: function: stability, steering and righting.

3. Wheel camber (negative camber): Function: increase tire contact surface and offset adverse effects.

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