Steering Tie Rods transmit force from the rack to the arm, moving the wheel which ties a vehicle's rack to the arm. These steering tie rods play a crucial role in system of your vehicle's steering.
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If a system was without these rods, it would fail. They create the point of pivot between a steering system and its arm and wheel. The tie rod end (outer) is adjustable, which means it can have its length adjusted according to the vehicle's alignment.