Why can't the steering wheel return to center completely?

[LeBryce]

Steering wheel misalignment is due to: The reason why the steering wheel cannot be fully adjusted after wheel alignment may be improper toe adjustment or incorrect front wheel deflection angle. Wheel alignment is based on the four-wheel parameters of the vehicle, adjusting them to ensure good driving performance and certain reliability. The steering wheel, steering knuckle, and front axle of a car have a certain relative installation position, which is called steering wheel alignment, also known as front wheel alignment. Introduction to wheel alignment: Front wheel alignment includes four parts: caster angle, camber angle, kingpin inclination angle, and toe angle. Rear wheel alignment includes camber angle and toe angle. Thus, front wheel alignment and rear wheel alignment are collectively referred to as wheel alignment, also known as four-wheel alignment. The purpose of wheel alignment is to maintain the car's stability in straight-line driving and turning, and to reduce wear and tear on tires and steering components during driving.