collapse is the angle between the plane of the wheel and the vertical. It can be positive if the wheels are tilted outward or negative if the wheels are tilted inward. The camber angle mainly affects the uniformity of front tire wear. If the camber of one wheel is positive and the other is negative, then the car will pull to the side when driving in a straight line.
Convergence is the projection of the angle between the plane of the wheel and the horizontal axis of the vehicle onto a horizontal plane. Positive toe means the wheels are closer together at the front than at the rear when measured at wheel midpoint height. Negative toe means that the wheels in the front are further apart than the wheels in the back.
Lateral inclination of an axis of turn of a wheel - this is the angle between the axis of rotation of the steering knuckle and the vertical, projected onto the vertical by a plane across the car.
Due to the camber angles and the transverse inclination of the axis of rotation, the points of contact of the wheels with the road are located closer to the axis of the steering knuckle. This supports the so-called «running shoulder», the easier it is to drive. Also, bumps from uneven surfaces are less transmitted to the steering.
Longitudinal inclination of the axis of rotation of the wheel. The axis, relative to which the wheel turns, is placed in space so that its lower part is directed forward. Such an angle of longitudinal inclination is called positive. With a positive value of the angle, the self-return of the wheel to the middle position after the turn is improved.
Adjustment of a convergence of back wheels
Rear wheel camber adjustment
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