Caster is the

Caster is the

• A. Upward tilt of the kingpin centerline when viewed from the side of the vehicle
• B. Forward or rearward tilt of the kingpin centerline when viewed from the side of the vehicle
• C. Left-right tilt of the kingpin centerline
• D. Vertical displacement of the springs

Answer: (B)

Caster is the forward or rearward tilt of the steering axis (the kingpin centerline) when viewed from the side. This angle determines how the wheel tends to straighten itself after turning and influences steering effort and straight-line stability. Positive caster, where the axis tilts toward the rear at the top, helps the wheel return to center and improves stability, while too much caster makes steering heavier. The other descriptions don’t fit because the upward tilt described would relate to camber, left-right tilt is camber viewed from the front, and vertical spring movement concerns ride height rather than the steering axis geometry.

Caster is the forward or rearward tilt of the steering axis (the kingpin centerline) when viewed from the side. This angle determines how the wheel tends to straighten itself after turning and influences steering effort and straight-line stability. Positive caster, where the axis tilts toward the rear at the top, helps the wheel return to center and improves stability, while too much caster makes steering heavier. The other descriptions don’t fit because the upward tilt described would relate to camber, left-right tilt is camber viewed from the front, and vertical spring movement concerns ride height rather than the steering axis geometry.