If the CA distance is too short, the front of the trailer may contact the back of the cab when making sharp turns. The hitch is usually located directly over the axle and acts as a pivot point. If the hitch is located in front or behind the axle, it acts as a lever and pivot; the more the distance, the greater the lever action, which affects backing into a space. The pin box on the trailer may be adjustable to increase/decrease the distance from the truck, but that may change the stress placed on the pin box. A hitch on a crew cab pickup truck, even with a long bed, may not provide sufficient clearance between the truck and trailer when turning.