Input (grade 13): Unlike the 1967 Tube Stock, the trains are built 40 m wider to take advantage of the Victoria line's slightly larger than normal loading gauge compared with the other deep-level tube lines.
Output (grade 7): The new trains are being built 40 m wider than the current 1967 Tube Stock. This is because the Victoria line has a larger than normal loading gauge compared to the other deep level tube lines..