Road Wheel Steering Geometry

DESCRIPTION
The steering angles that will allow perfect rolling of the wheels on cornering vary slightly according to the speed at which the vehicle is travelling and the sharpness of the corner, because of suspension movement and tire deflection.

The steering angles have been determined to suit most normal driving conditions. Because the track arms are slightly inset when the wheels are in the straight-ahead position, the steering angle of the inner wheel on cornering will be slightly greater than that of the outer wheel. Prior to the steering angles being checked, ensure to toe setting is correct.

The steering angles are measured using standard graduated turntables together with optical measuring equipment. The turntables should be positioned as close to the swivel axes of the wheels as possible.

Rotate steering wheel to the left, until the right wheel (outer wheel) shows a deflection of 20°. If steering angle is correct, the inner wheel should show a deflection of 21° ± 1 - 2°. Repeat measurement with wheels rotated in opposite direction. If measurements are incorrect, one or both track arms are defective. Do not bend defective track arms to compensate for incorrect measurements, they must be replaced.