Adjustment of the inner steering links forwards or backwards changes the Ackermann angle which controls how much the car’s toe angle changes as the wheels are turned either direction. Most cars are set up so that the toe-in angle decreases (toe-out increases) as the wheels are turned in either direction. Depending on the car, this adjustment can be made by:
Lower Ackermann angle (links straighter)
Higher Ackermann angle
Bump steer is adjusted by changing the vertical angle of the steering links, either at the inside (rack) or at the outside (steering arm.). Bump steer is the change in a car’s toe angle as the suspension compresses. If you change camber link locations, toe-in, or kick-up, you may need to re-adjust bump steer to keep the handling characteristics consistent.
Less bump steer
More bump steer