→Semitrailing-link suspension offers much more room for the design of the wheel elevation curves or the longitudinal and transverse poles.
→For favorable kinematic properties to be realized in modern designs, the projection of the axis of rotation of the link on the transverse plane of the vehicle is inclined by the so-called apex angle β; while its projection on the plane of the road is inclined by the so-called sweep (angle) α, see figure.
The locations of the longitudinal and transverse poles can be determined graphically. The difference between camber angle γ and apex angle β (magnitude: ±3°) decisively influences toe-angle variation during suspension movement. The magnitude of kinematic toe-angle variation and the height of the roll center above the road surface are essentially determined by the sweep (angle) α (magnitude: 10 - 25°).
An additional feature in the Opel Omega → A guidance element that is fixed to the chassis subframe and the wheel carrier and supports the wheel forces. This way, load is taken off the wishbone-arm.
→Location and orientation of the element are calculated in such a way that only minor changes in toe occur on the wheels during driving. This improves the lateral-force stability of the axle.
A semitrailing-link suspension system with additional degrees of freedom of design is represented by the worm-and-nut-steered rear axle used in the 5 and 7 series of BMW until the model years ´96 / ´94.