Steering caster,a caster wheel which can swivel. And change direction in any way.
by caster
Too much positive caster
Caster, Camber and Toe.
To answer in short, a negative caster in your alignment is if the steering pivot is positioned behind the wheel pivot. to visualize caster, just remember this. Positive caster = Shopping cart Negative caster = Bicycle
Caster, camber and toe.
The front suspension may have excessive positive caster.
The alignment angle called caster helps with steering wheel return.
Caster, camber and toe are part of the front end and steering alignment.
Toe: in or out. Chamber: positive or negative. Caster: measured in degrees.
Excessive caster is a drivability concern and will not cause tire wear. It will however cause instability in the steering. It will cause the steering to not automatically center after making a turn, and in server cases can cause the steering to be extremely sensitive and over-steer at the slightest input. This can be made worse by wheel shimmy. If caster is unequal from side to side, the the car will pull to the side that is most negative.
Your wheels are probably out of alignment. You need to have the camber, caster, and toe out checked and adjusted. A failed or damaged component in the steering system is another possibility.
Wheel alignments ensure that all four wheels are consistent with each other and are optimized for maximum contact with the surface of the road. The way a wheel is oriented in the car is broken down to three major components; camber, caster, and toe.