Which of the following accurately describes caster as it applies to heavy-duty trucks?

A) a directional stability angle
B) front end is set with some positive caster
C) tandem-drive trucks need less positive caster than single drive axle trucks
D) all of the above

Caster

The forward or rearward tilt of the kingpin centerline to vertical when viewed from the side. Zero caster indicates that the kingpin is located at true vertical. Positive caster occurs when the kingpin tilts rearward (leans behind) and negative caster occurs when the kingpin tilts forward.

Heavy-duty Trucks

Large and robust trucks designed to haul significant weight, often used for commercial, construction, or industrial purposes.

Positive Caster

The angle created by the steering pivot points in the front wheels of a vehicle, enhancing stability and steering effort.