What are the four components of front wheel alignment?

[DeAthena]

Steering wheel alignment parameters include: caster, kingpin inclination, wheel camber, and toe-in. Below is additional information: 1. Typically, wheel alignment mainly refers to front wheel alignment, though many vehicles now require four-wheel alignment. Its functions are to maintain the stability of straight-line driving, ensure easy steering during turns, enable self-centering of steering wheels, and reduce tire wear. 2. When the kingpin is installed on the front axle with its upper rear part slightly inclined inward, it is called kingpin inclination. The purpose of kingpin inclination is to allow the wheels to self-center after steering and make steering easier. The inclination angle is generally 5°~8°. 3. Both caster and kingpin inclination help the vehicle self-center after steering and maintain straight-line driving. The main difference is that the self-centering effect of caster is related to vehicle speed, while that of kingpin inclination is not.