Correct answer
Through the combined action of the castor and kingpin inclination angles.
Through steering geometry, particularly caster and steering-axis inclination, which encourage wheels to return to straight-ahead travel. The worm gear transmits steering-wheel movement and can work with different mechanisms, rather than only a roller. Wheel-balancing weights do not perform this function.
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Due to the springs located inside the steering box.
Through the combined action of the castor and kingpin inclination angles.
Due to the counterweights fitted to the steered wheels.
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