1. First, adjust the height of the rear suspension of the vehicle to the normal position.
2. Secondly, find the fixing screw of the adjustable elbow and adjust the height of the rear wheel suspension to the normal position.
3. Then, adjust the length and angle of the adjustable elbow to adapt it to the serious situation of the rear wheel of the vehicle.
4. Finally, after adjustment, tighten the fixing screw of the adjustable elbow.