A
Wheel center to center of tow ball.
1151 (45.3)B
Center of tow ball to side member.
417 (16.4)C
Distance between side members.
834 (32.8)D
Center of tow ball to center of first attachment point.
476 (18.7)E
Center of tow ball to center of second attachment point.
551 (21.7)
Maximum Permissible Trailer Vertical Weight