What does "negative caster" mean?

Negative caster refers to a condition where the steering axis is tilted rearward when viewed from the side of the vehicle. This configuration results in specific handling characteristics, primarily affecting steering response and stability.

When the steering axis leans rearward, it can lead to a less stable steering feel. This is because the wheels may not return to the straight-ahead position as effectively after a turn, resulting in a delayed response. This can make the vehicle feel less predictable and more challenging to control, particularly during fast maneuvers or when changing directions.

In contrast, positive caster, where the steering axis leans forward, generally improves steering stability and feedback, making the vehicle feel more responsive. Understanding caster, especially in the context of alignment adjustments, is crucial for maintaining optimal vehicle performance and handling characteristics.