If the vehicle's ride height is correct on the front but lower than specification on the rear, which front alignment angle would be most affected?

When the ride height of a vehicle is correct in the front but lower than specifications in the rear, the front caster angle is most impacted. Caster refers to the angle created by the steering pivot point in relation to the vertical axis when viewed from the side. If the rear is lower, it can influence the weight distribution and suspension geometry of the front suspension.

As the rear suspension compresses, it can affect the handling characteristics and stability, altering how the front wheels contact the road during steering. Specifically, a significant change in ride height can lead to a change in the caster angle, impacting steering feel and the vehicle's return to center after turning.

In contrast, toe, which measures the direction the tires are pointing relative to each other, and camber, which refers to the tilt of the tires inward or outward from a vertical perspective, are less directly influenced by rear height changes. The Steering Axis Inclination (SAI) is also less likely to be affected in this scenario. Therefore, caster becomes the alignment angle most susceptible to changes due to variances in ride height in the rear of the vehicle.