This "Front Runner" piggyback car was designed to carry truck trailers. It has four wheels instead of a pair 0f two-axle trucks, 28-inch diameter wheels rather than 33-inch diameter wheels which were standard on most freight cars. It did not have a continuous floor so it could not accommodate containers nor could a trailer be towed aboard by a tractor. The trailer could only be loaded by an overhead crane. The car is 53'10" in length, weighs 25,500 pounds empty, and has a capacity of 65,000 pounds.