The automobile four-wheel aligner is used to detect the automobile wheel alignment parameters, and to compare them with the original design parameters.

Through angle measurement, guide the user to adjust the wheel positioning parameters accordingly to meet the original design requirements to achieve the ideal car performance, it is divided into front wheel positioning and rear wheel positioning, including camber ,caster, SAI, toe back angle, thrust angle, max turn angle, axle offset. It's a part of the car maintenance.

Generally, the wheel alignment need to be used with a four post car lifter or scissor car lift.