# How do you calculate caster angle?

## How do you calculate caster angle?

Turn the steering wheel right until the wheel is turned 20 degrees right of straight ahead (turning 40 degrees total). Hold the gauge at a 90-degree angle and the reading will be your caster angle for the left wheel.

## What is the correct caster angle?

Generally you want as much positive caster as you can reasonably get so long as the car is equipped with power steering. Positive caster angles run between 3 – 5° on modern vehicles. This gives a good mix of highway stability and steering feel.

How is caster measured?

The diameter is measured with the wheel lying flat on its side, and with a measuring device measure from one side of the wheel to the opposite side. If the wheel is 8”, then the caster is considered a 8” caster. It’s important to make sure the measuring device passes over the center of the wheel.

### What is caster angle in alignment?

Caster is the angle that identifies the forward or backward slope of a line that is drawn through the upper and lower steering pivot points. It does not affect tire wear, but caster does have an influence on the directional control of the steering.

### What is the purpose of caster angle?

The purpose of this is to provide a degree of self-centering for the steering—the wheel casters around in order to trail behind the axis of steering. This makes a vehicle easier to control and improves its directional stability (reducing its tendency to wander).

What is KPI angle?

What Is King Pin Inclination (KPI)? On current suspension systems, the kingpin is set at an angle to the vertical plane when viewed from the front or rear of the vehicle. This angle is known as the king pin inclination.

## How do you measure king pin angle?

King pin is located inside and at- tached to the axle of a car. Since king pin is not directly accessible, its angle cannot be measured directly. To measure these angles, the steering tires mounted on the vehicle are turned 30 degree left and 30 degree right about the vertical axis and its tilt is measured.

## How do you calculate the caster angle on a car?

An absolutely flat surface is needed for accurate measurement. Attach the gauge to the right front wheel hub. Turn the steering wheel 20 degrees right. Level the gauge and set it to 0 degrees. Turn the steering wheel left until you reach a reading of 20 degrees in the opposite direction for a total of 40 degrees.

Is there a negative caster angle in F1?

All F1 cars run with at least a few degrees of positive caster angle – as far as I am aware there is no need to use a negative angle – and in some cases it can be over 10 degrees.

### What does caster stand for in wheel alignment?

Wheel Alignment: Caster Angle. Caster is the forward or backward tilt of the steering axis viewed from the side of the vehicle. Vehicles with SLA suspensions use the upper and lower ball joints to create the angle, and those with struts use the center of the upper strut mount and the lower ball joint as the angle.

### Which is an example of a caster angle?

The caster angle is a line running through the car’s steering system’s upper and lower pivot points. Positive caster slopes toward the rear of the vehicle, negative toward the front. The front steering forks on a motorcycle are an easy-to-see example of how caster works.

04/12/2019