Three chassis mounting points, one for the top camber control link, two for the H-arm.

Three upright mounting points, one for the top camber control link, two for the H-arm.

In the H-arm IRS all driving and braking loads are reacted by the lower lateral H-arm in torsion and bending. Reactions to all wheel centre inputs in the longitudinal direction result in torsional loading of the H-arm. The upper camber control link controls the front view instant centre. The side view instant centre is controlled solely by the H-arm.