What is bump steer and how do you minimize it in suspension design?

Bump steer is the unwanted steering input that occurs when suspension moves through its travel, caused by misalignment of the steering tie rod arc with the suspension control arm arc. To minimize bump steer, the tie rod inner pivot must be positioned so its arc matches the lower control arm arc through the suspension travel. This requires careful design of tie rod length, angle, and mounting point locations relative to suspension geometry.