Tie rod ends are simple parts that connect the steering rack to the steering knuckle on each front wheel. An adjusting sleeve sits between the inner and outer tire rod ends. When you turn the steering wheel, it transmits that movement through various steering components until the tie rod ends push or pull the wheel and make the wheels turn The outer tie rod end connects with an adjusting sleeve, which allows the length of the tie rod to be adjusted to set the vehicle’s critical alignment angle, making it an essential part in your steering system