What is the effect of caster on a vehicle’s steering characteristics?

Caster is the angle created by the steering axis, which is an imaginary line that runs through the upper and lower pivot points of the steering system, when viewed from the side of the vehicle. When the top of the steering axis is tilted towards the rear of the vehicle, it is considered positive caster. This positive caster plays a crucial role in the steering characteristics of a vehicle.

Positive caster helps improve steering response by providing better straight-line stability and enhancing the self-centering effect of the steering wheel. This means that when a driver turns the steering wheel, the steering system naturally wants to return to the center position after the turn, making it easier to handle the vehicle. With a well-balanced caster angle, the vehicle feels more responsive and controlled, thus improving driving performance.

While other factors do impact vehicle dynamics, such as tire wear, camber angle, and suspension travel, they are not directly related to the primary purpose of caster in steering. Caster primarily influences the feedback that a driver receives through the steering wheel and the overall handling of the vehicle rather than these other aspects.