Off-tracking or cheating causes which of these to follow the wider path while making a turn?

Tractor with two 27-feet trailers.

When a vehicle makes a turn the arc (path) taken by each wheel is different. The path is less noticeable on short passenger vehicles while being much more pronounced on long vehicles. Off-tracking is a method to ensure that the path of the rear wheels of the trailer can clear the turn of any obstacles that may be near, such as vehicles sitting at an intersection. The wheels of the furthest trailer will off-track the greatest amount.

Source: Alaska CDL Manual